The final concentration of NaCl in the new solution is 0.15 mg/mL.
To find the final concentration of NaCl in the new solution after diluting 750 μL of a 1 mg/mL NaCl solution with water to a final volume of 5 mL, you can use the formula C1V1 = C2V2.
First, convert the volumes to the same unit. Here, we will convert 750 μL to mL.
750 μL = 0.75 mL.
Now, plug in the values into the formula:
(1 mg/mL) * (0.75 mL) = (C2 mg/mL) * (5 mL)
To find C2, the final concentration, divide both sides of the equation by 5 mL:
C2 = (1 mg/mL) * (0.75 mL) / (5 mL)
C2 = 0.15 mg/mL
So, the final concentration of NaCl in the new solution is 0.15 mg/mL.
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The fact that the embryonic head develops before the body illustrates the ____ principle.a. cephalocaudalb. incomplete dominancec. proximodistald. niche-picking
The fact that the embryonic head develops before the body illustrates the cephalocaudal principle. This principle refers to the pattern of growth and development in which structures near the head develop before those near the feet.
This is seen in embryonic development as well as in the growth and development of infants and children. For example, during infancy, a baby's head circumference increases more rapidly than their body length. This principle is important for understanding normal human development and can help healthcare professionals identify potential developmental delays or abnormalities. In addition, understanding the cephalocaudal principle can also inform interventions and therapies for individuals with developmental disorders or injuries that affect specific areas of the body. Overall, the cephalocaudal principle is an important concept in human development that highlights the sequential and orderly nature of growth and development.
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What is Mrs. Adler's glomerular filtration rate (rounded to the nearest liter)? A) 126 L/day. B) 80 L/day. C) 131 L/day. D) This cannot be determined
The normal glomerular filtration rate (GFR) for an adult is around 90-120 mL/min, which translates to approximately 130-170 L/day.
However, the options provided in the question are much higher than the normal range, which suggests that they may be incorrect or referring to a different measurement. Therefore, it is not possible to determine Mrs. Adler's GFR from the given options.
In addition, calculating an individual's GFR requires measuring their creatinine clearance or using other tests such as cystatin C or blood urea nitrogen (BUN). GFR is not typically expressed in liters per day, but rather in milliliters per minute. Therefore, the options provided in the question are unlikely to be correct.
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leukocytes move through interstitial spaces using ______, a type of self-propulsion.
Answer:
leukocytes move through interstitial spaces using amoeboid motion a type of self-propulsion.
Leukocytes, also known as white blood cells, move through interstitial spaces using amoeboid motion. This type of self-propulsion involves the extension and retraction of cell protrusions, known as pseudopodia, which allow the cell to crawl along surfaces and navigate through tight spaces.
Amoeboid motion is essential for leukocytes to carry out their immune functions, such as identifying and engulfing foreign particles or pathogens. The ability of leukocytes to move through interstitial spaces is critical for their ability to travel to sites of infection or inflammation, where they can mount an immune response to protect the body from harm.
This type of self-propulsion allows leukocytes to navigate through tissue by extending parts of their cell membrane, known as pseudopods, and then retracting their trailing end. This coordinated movement is essential for leukocytes to reach the site of infection or inflammation, where they perform their immune defense functions, such as phagocytosis and releasing cytokines. Amoeboid motion is an efficient way for leukocytes to migrate in response to chemical signals, allowing them to rapidly respond to threats within the body.
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in somatic cells, sister chromatids a. are identical to one another. b. are produced durng s phase. c. all of the other choices are correct. d. exist in the g2 stage of the cell cucle.
In somatic cells, sister chromatids exist in the G2 stage of the cell cycle.
D is the correct answer.
Each somatic cell contains 23 x 2 = 46 diploid chromosomes, totaling 46 in all. Each chromosome replicates itself during the S phase. This results in the production of two copies of each chromosome—one from the mother and one from the father. Sister chromatids are these identical copies.
The genetic makeup of sister chromatids is identical. That is, they are exact replicas of one another produced for cell division. The phrase "sister chromatid" is actually only used during the phases of cell division when the structures are in an X shape or when the two copies are joined by a centromere.
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describe why the dominant alleles for body color and wing shape are the alleles that produce a gray body and long wings,
The black body vestigial wing and the grey body long wings are parental pairings in the findings above. Recombinants include the ebony body with lengthy wings and the grey body with vestiges of wings.
Given ratios in the progeny suggest that large wings and grey bodies are expressed. The two qualities' genes are separately arranged, which implies they are unrelated genes that are present on the same chromosome.There is a 50% probability that flies with the grey body and relic wings will result from the cross between Gl and hybrid. The majority of the time, it appeared that the alleles for body colour and wing shape were inherited jointly.
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Describe why the dominant alleles for body color and wing shape are the alleles that produce a gray body and long wings?
suppose that a mother seeks genetic counseling because she is concerned that her child may have velocardiofacial syndrome, a syndrome that can result in symptoms such as a cleft palate and heart defects. the genetic counselor is aware that this disease is caused only by a small deletion in chromosome 22q11.2, that traditional karyotyping often overlooks. consequently, the genetic counselor informs the mother that a cost-effective test will be conducted to visually detect the presence or absence of the specific chromosomal change by using velocardiofacial syndrome-specific probes and a sample of the child's dna. to which technique is the genetic counselor likely r
The genetic counselor is likely referring to the technique of fluorescence in situ hybridization (FISH) to detect the specific chromosomal change associated with velocardiofacial syndrome.
FISH is a molecular cytogenetic technique that uses fluorescent probes that bind to specific DNA sequences, allowing for the visualization of specific chromosomes or chromosomal regions. In this case, the genetic counselor would use velocardiofacial syndrome-specific probes to detect the presence or absence of the small deletion in chromosome 22q11.2 associated with the syndrome.
FISH is a cost-effective and reliable technique for detecting chromosomal abnormalities and is commonly used in genetic counseling and clinical diagnosis.
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Which amino acid would most likely be found in the interior of a globular protein? A. Lysine B. Alanine C. Glutamate D. Serine E. Aspartic acid
The amino acid that is most likely to be found in the interior of a globular protein is alanine. This is because alanine is a non-polar amino acid and is relatively small in size compared to other amino acids.
Due to its non-polar nature, it tends to be buried in the interior of the protein, away from the aqueous environment that surrounds the protein. The smaller size of alanine also makes it easier to fit within the tightly packed interior of the protein. On the other hand, polar amino acids like lysine, glutamate, aspartic acid, and serine tend to be found on the surface of the protein, where they can interact with water molecules. In summary, the non-polar and relatively small size of alanine makes it the most likely amino acid to be found in the interior of a globular protein. The amino acid most likely to be found in the interior of a globular protein is B. Alanine. In globular proteins, nonpolar and hydrophobic amino acids tend to be located in the interior, while polar and hydrophilic amino acids are typically found on the surface. Alanine is a nonpolar, hydrophobic amino acid, making it a suitable candidate for the interior of a globular protein. This positioning helps to maintain the protein's structural stability and protect the hydrophobic core from the aqueous environment.
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red hair is a ___ trait, which is why it is not very common.
Red hair is a recessive trait.
A recessive trait is one that is expressed only when two copies of the gene responsible for it are present.
In the case of red hair, both parents must pass down the gene for it to be expressed in their offspring.
This is why red hair is less common compared to dominant traits, which only require one copy of the gene to be expressed.
Red hair is a recessive trait, which is why it is not very common.
Red hair is classified as a recessive trait.
Summary: Red hair is a less common trait because it is recessive, meaning it requires two copies of the gene to be expressed in an individual.
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Red hair is a recessive trait in genetics. A recessive trait is only expressed if an individual inherits two copies of the trait. The gene for red hair needs both parents to, at least, carry the gene for it to be expressed, contributing to red hair's rarity.
Explanation:Red hair is a recessive trait, which is why it is not very common. In genetics, dominant traits are those that are expressed or visible when inherited from just one parent. However, a recessive trait only shows if the individual has two copies of the recessive trait, one from each parent. Since the gene for red hair is recessive, it's less common because it requires both parents to at least carry the gene, even if they do not display the trait themselves.
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Write a paragraph explaining the difference between things that have matter and things that don't have matter.
Answer:
Things that have matter are physical substances that occupy space and have mass. This means that things that have matter are made up of particles and have a physical presence. Matter can exist in different states, such as solid, liquid, or gas. Examples of matter include rocks, water, air, and living organisms. Things that don't have matter, on the other hand, are not physical substances and do not occupy space or have mass. For example, light and sound are forms of energy that do not have matter. They can be observed and measured, but they do not have mass or take up space.
Explanation:
where in the body does the production of precursors for the synthesis of calcitriol occur?
The production of precursors for the synthesis of calcitriol occurs primarily in the liver, as well as in the skin and kidneys.
Specifically, cholesterol molecules are converted into the precursor molecule 7-dehydrocholesterol in the skin and then transported to the liver and kidneys where it is converted into vitamin D3. This vitamin D3 then undergoes further conversion in the kidneys to become calcitriol, the active form of vitamin D. Calcitriol plays a crucial role in regulating calcium and phosphorus absorption in the intestines and maintaining healthy bones and teeth.
The production of precursors for the synthesis of calcitriol occurs primarily in the liver and skin. In the skin, exposure to sunlight converts 7-dehydrocholesterol into previtamin D3, which is then transformed into vitamin D3 (cholecalciferol). Cholecalciferol is transported to the liver, where it is converted into 25-hydroxyvitamin D3 (calcifediol), the main circulating form. Finally, calcifediol is further hydroxylated in the kidneys by the enzyme 1-alpha-hydroxylase, producing the biologically active form of vitamin D, calcitriol (1,25-dihydroxyvitamin D3). This entire process is essential for maintaining healthy calcium and phosphorus levels in the body.
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the agency responsible for ensuring safe and accurately labeled meat, poultry, and eggs is the
The agency responsible for ensuring safe and accurately labeled meat, poultry, and eggs is the United States Department of Agriculture (USDA).
The USDA's Food Safety and Inspection Service (FSIS) is responsible for inspecting meat, poultry, and egg products to ensure they are safe, wholesome, and correctly labeled and packaged.
The FSIS employs food inspectors who work in slaughterhouses, processing plants, and other facilities to check the meat and poultry products for compliance with federal regulations.
The agency also regulates the use of food additives and preservatives in these products.
The USDA's role in food safety helps to protect consumers from the risks of foodborne illness and ensures the quality of meat, poultry, and egg products sold in the United States.
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The effect of epinephrine upon the liver is most similar to which of the following hormones? A) insulin. B) glucagon. C) leptin. D) resistin. E) ghrelin.
The effect of epinephrine on the liver is most similar to glucagon. This is important for maintaining blood sugar levels during times of stress or exercise when the body needs energy.
Both epinephrine and glucagon increase glucose production in the liver by activating enzymes involved in glycogenolysis, the breakdown of glycogen into glucose. Insulin, on the other hand, decreases glucose production in the liver and promotes storage of glucose as glycogen. Leptin, resistin, and ghrelin are hormones involved in regulating appetite and energy balance, and do not have a direct effect on liver glucose production. It is important to note that hormones work in concert with each other to maintain homeostasis in the body, and their effects can vary depending on the specific circumstances and physiological needs of the individual.
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.Which of the following is/are a characteristic of skeletal muscle? Check all that apply.
-Overlapping thin and thick filaments
-Striations
-Overlapping myosin and actin proteins
-Excitability
- Involuntary
-Overlapping thin and thick filaments
-Striations
-Overlapping myosin and actin proteins
-Excitability
(Not Involuntary - skeletal muscle is under voluntary control)
Skeletal muscle: Skeletal muscles are voluntary muscles, meaning you control how and when they move and work. Nerves in your somatic nervous system send signals to make them function. If you reach for a book on a shelf, you're using skeletal muscles in your neck, arm and shoulder.
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22. one of the benefits of photorespiration is removing toxic: a. 3-phosphoglyceraldehyde. b. phosphoglycolate. c. ribulose-bisphosphate. d. 3-phosphoglycerate. e. oxaloacetate.
One benefit of photorespiration is the ouster of toxic: phosphoglycolate. The correct answer is (B).
When plants don't have enough carbon dioxide, they go through a process called photorespiration, which causes the Rubisco enzyme to oxygenate ribulose bisphosphate rather than carboxylate it. Two molecules of 3-phosphoglycerate and one of phosphoglycolate, both of which are harmful to plants, are produced as a result. To prevent phosphoglycolate accumulation and toxicity, plants have developed mechanisms to convert it into other useful metabolites, such as glycerate-3-phosphate.
However, it might have additional advantages for plants. There is some evidence that photorespiration can support plant immune defenses, help maintain the redox balance in cells, and prevent light-induced damage to molecules involved in photosynthesis. 8start superscript, 8 end superscript
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treadmills, cycles, and swimming flumes are used to estimate vo2max. what are these devices called? A) exercise equipment B) ergometers C) tissot spirometers D) cardiac rehab devices
The devices used to estimate VO₂ max from treadmills, cycles, and swimming flumes are called ergometers.
Ergometers are specialized exercise equipment that are used to measure the amount of work being done during physical activity. They are commonly used in research and clinical settings to determine VO₂ max, which is the maximum amount of oxygen that an individual can utilize during exercise.
Treadmills, cycles, and swimming flumes are all examples of ergometers because they can be calibrated to measure the amount of work being done by the user. Tissot spirometers are devices used to measure lung function and are not specifically designed to estimate VO₂ max. Cardiac rehab devices are used to monitor heart rate and blood pressure during exercise, but they are not used to estimate VO₂ max. Ergometers are essential tools for understanding an individual's fitness level and developing appropriate exercise programs to improve health and performance.
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The effects initiated by the endocrine system are longer lasting than those of the nervous system. True or False.
True. The endocrine system produces hormones that are released into the bloodstream and can travel throughout the body, affecting various organs and tissues.
These effects can last for minutes, hours, or even days. In contrast, the nervous system relies on neurotransmitters that are quickly metabolized, leading to more immediate and short-lived effects. However, the nervous system can also initiate long-term changes through processes such as learning and memory. Overall, both systems have their unique strengths and contribute to maintaining homeostasis in the body.
True, the effects initiated by the endocrine system are indeed longer lasting than those of the nervous system. The endocrine system releases hormones, which are chemical messengers that travel through the bloodstream to target cells or organs. Hormonal actions are slower and more sustained because they take time to be synthesized, released, and act on their targets. In contrast, the nervous system uses electrical impulses for communication, which allows for quicker but more short-lived effects. Thus, while the endocrine system provides long-lasting, widespread control, the nervous system allows for rapid, localized responses.
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what type of special documentation is needed with fish that will be eaten raw or partially cooked?
The documentation requirements for raw or partially cooked fish are designed to protect consumers and ensure that the fish is safe to eat.
When it comes to fish that will be eaten raw or partially cooked, there are certain special documentation requirements that must be met. First and foremost, the fish must be labeled as “sushi-grade” or “sashimi-grade,” indicating that it has been specifically prepared and handled for raw consumption. Additionally, the fish must be stored and transported at the correct temperatures to ensure that it remains fresh and safe to eat. In terms of documentation, there are a few key pieces of information that must be provided. This includes the name and location of the fishery or farm where the fish was sourced, as well as the date of harvest.
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one concern of using technology such as amniocentesis in countries like china and india is
One concern about using technology such as amniocentesis in countries like China and India is sex-selective abortion.
Amniocentesis is a prenatal diagnostic test that can identify chromosomal abnormalities and genetic disorders in fetuses. However, in countries where cultural or economic factors favor male children, the test has been misused to selectively abort female fetuses, leading to skewed gender ratios. This has resulted in significant social and demographic consequences, including a shortage of marriage partners for men, an increase in the trafficking of women and girls, and a decline in the overall quality of life for women. To address this issue, some countries have implemented laws to restrict the use of prenatal diagnostic tests for non-medical reasons and to prohibit sex-selective abortion. However, enforcing these laws can be challenging, and cultural attitudes toward gender and family planning continue to pose significant ethical and social dilemmas in these countries.
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if each level in a food chain typically loses 90 percent of the energy it takes in, and the producer level uses 1000 kcal of energy, how much of that energy is left after the... a) second trophic level?
Answer:
100 kcal
Explanation:
If the primary trophic level is producers and they have 1000 kcal then the second trophic level (primary consumers) will get 100 kcal of energy from eating those producers according to the rule of 10's (rule of tens is the same as 90% lost per trophic level)
Following the rule of 10's the third trophic level (secondary consumers) would get 10 kcal from the initial 1000 kcal after eating the primary consumer.
4th (tertiary consumers) would get .1 kcal of the original 1000 kcal
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what should the nurse include as a possible adverse effect when teaching a client about phenytoin?
Phenytoin is an anticonvulsant medication used to treat seizures. When teaching a client about phenytoin, the nurse should include the possible adverse effects of the medication.
The nurse should also inform the client that they should contact their healthcare provider immediately if they experience any of these adverse effects or other unusual symptoms while taking phenytoin.Phenytoin is an antiepileptic drug that is used to treat seizures. It works by reducing the activity in the brain that causes seizures. Phenytoin is effective in treating different types of seizures, including tonic-clonic seizures, partial seizures, and status epilepticus. It is available in both oral and injectable forms.Phenytoin is a medication that requires careful monitoring, as it has a narrow therapeutic range. This means that the drug must be dosed carefully to avoid toxicity or side effects. Blood levels of phenytoin should be monitored regularly to ensure that the medication is working effectively and to prevent toxicity.
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The structures though which small molecules travel between plant cells (cytoplasm to cytoplasm) are Simplest spaces Applets channels Plasmodia Spongy mesophyll
The structures through which small molecules travel between plant cells (cytoplasm to cytoplasm) are called plasmodesmata. Plasmodesmata are tiny channels that traverse the cell walls and connect the cytoplasm of adjacent plant cells.
These channels are present in all types of plant cells, including the spongy mesophyll cells which are located in the middle layer of the leaf and play a crucial role in gas exchange during photosynthesis. The structures through which small molecules travel between plant cells (from cytoplasm to cytoplasm) are called plasmodesmata. These are small channels that connect the cytoplasm of adjacent plant cells, allowing for the exchange of molecules and communication between the cells. Plasmodesmata can be found in various plant tissues, including the spongy mesophyll, which is a part of the leaf where photosynthesis takes place.
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whether to use a decision table or a decision tree often is a matter of personal preference.T/F
False. The decision to use either a decision table or a decision tree is not solely a matter of personal preference. Both methods are tools used in decision-making and have their own advantages and disadvantages.
A decision table is a matrix that displays all possible combinations of conditions and actions, making it useful when dealing with complex business rules or multiple inputs. It is easy to understand and modify but can become unwieldy when dealing with a large number of conditions or actions.
On the other hand, a decision tree is a graphical representation of decision-making that starts with a single node and branches out into different paths based on conditions. It is useful when dealing with a small number of conditions and actions, but can become difficult to understand and modify when the decision-making process becomes complex.
Therefore, the choice between a decision table and a decision tree depends on the specific problem being addressed and the complexity of the decision-making process. It is important to carefully evaluate the pros and cons of each method and choose the one that best fits the requirements of the problem at hand.
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can someone give me a brief explanation of what a comfort zone is? i have a character that is still in her comfort zone and i want to do research
Answer:
a place or situation where one feels safe or at ease and without stress.
Explanation:
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A small, wormlike structure attached to the posteromedial surface of the cecum is the
appendixcommon bilecircular foldsuvula
The small, wormlike structure attached to the posteromedial surface of the cecum is the appendix.
The appendix is a small, finger-like projection located at the junction of the small and large intestines, specifically on the posteromedial surface of the cecum. Although the appendix is often considered a vestigial organ with no known function, recent research suggests that it may play a role in the immune system and gut microbiome. The appendix can become inflamed or infected, resulting in a condition called appendicitis, which can be a medical emergency if left untreated. Treatment for appendicitis typically involves surgical removal of the appendix, a procedure known as an appendectomy. The circular folds, or plicae circulares, are permanent circular folds of the small intestine that increase the surface area for absorption of nutrients, while the common bile duct is a tube that carries bile from the liver and gallbladder to the small intestine. The uvula is a small, cone-shaped structure that hangs from the soft palate in the back of the throat and plays a role in speech and swallowing.
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Which of the following mutations could result in the insertion of proline in place of alanine? A mutation in Alanyl-tRNA synthetase which ligates alanine to tRNAPro. A mutation in Prolyl-tRNA synthetase which ligates alanine to tRNAPro A mutation in tRNAPro that allows it to be recognized and aminoacylated by Alanyl-tRNA synthetase A mutation in tRNAAla that allows it to be recognized and aminoacylated by Prolyl-tRNA synthetase.
None of the mutations listed would result in the insertion of proline in place of alanine. Alanyl-tRNA synthetase is the enzyme responsible for attaching alanine to tRNAAla, not tRNAPro. Therefore, a mutation in this enzyme would not lead to the incorporation of proline in place of alanine.
Prolyl-tRNA synthetase is the enzyme responsible for attaching proline to tRNAPro, not tRNAAla. Therefore, a mutation in this enzyme would not result in the incorporation of proline in place of alanine. A mutation in tRNAPro that allows it to be recognized and aminoacylated by Alanyl-tRNA synthetase would lead to the incorporation of alanine in place of proline, not the other way around.
A mutation in tRNAAla that allows it to be recognized and aminoacylated by Prolyl-tRNA synthetase would result in the incorporation of alanine in place of alanine, not the incorporation of proline in place of alanine.
Therefore, none of the mutations listed would result in the insertion of proline in place of alanine.
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help me with this please
Among the tissues that produce hormones in the organism, we can find the endocrine glands which produce hormones and release them into the bloodstream. The endocrine system releases hormones to the bloodstream, and the circulatory system carries them to the target location.
What are the tissues that produce hormones?
Those tissues that produce hormones might be classified as:
1. endocrine glands (produce hormones exclusively),
2. exocrine glands (produce hormones and other secretions),
3. non-glandular tissues that secrete hormones but are not glands.
Endocrine organs, also known as ductless glands or endocrine glands, release their secretion directly into the bloodstream. Blood transport hormones to target cells, tissues, and organs, where they stimulate a change in metabolic activities
Exocrine glands release their secretions to a duct in the internal or external surface of cutaneous tissues, stomach mucose, or pancreatic ducts.
The endocrine system releases hormones to the bloodstream, and the circulatory system carries them to the target location.
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the wave pattern of the hair refers to the ______ of the hair strand.
The wave pattern of the hair refers to the "shape" of the hair strand.
The wave pattern in hair is determined by the shape of the hair strand.
This can vary from straight to wavy, curly, or coily, depending on the individual's hair type and genetics.
The wave pattern of the hair is determined by the shape of the hair strand, which is in turn determined by the shape of the hair follicle.
Summary: In conclusion, the wave pattern of hair is a reference to the shape of the hair strand, which can be influenced by various factors such as genetics and hair type.
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during ct examination of the chest, the administration of a saline flush following the bolus injection of iodinated iv contrast media helps alleviate artifact from dense contrast in the:
A saline flush administered after the bolus injection of iodinated intravenous contrast media reduces artefact caused by dense contrast in the superior vena cava during ct scanning of the chest.
The right atrium receives deoxygenated blood that has been collected from the body by the superior vena cava (SVC), a sizable, important vein. It can be found in the middle and superior mediastinum.
The venous return of blood from organs above the diaphragm is handled by the superior vena cava.
Blood from the head, neck, arms, and chest is transported through the superior vena cava. Blood is transported from the legs, foot, and organs in the pelvis and abdomen through the inferior vena cava.
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Antigenic variation is common in influenza B and C but is rare in influenza A. (T/F)
The following statement “Antigenic variation is common in influenza B and C but is rare in influenza A.” is False.
Antigenic variation is actually more common in influenza A compared to influenza B and C. Influenza A viruses are known to undergo frequent antigenic changes through two mechanisms: antigenic drift and antigenic shift.
Antigenic drift refers to the gradual accumulation of genetic mutations in the surface proteins of the influenza virus, namely hemagglutinin (HA) and neuraminidase (NA). These mutations can result in minor changes in the viral antigens, allowing the virus to evade recognition by previously acquired immune responses. Antigenic drift is responsible for the seasonal flu epidemics and the need for annual influenza vaccine updates.
Antigenic shift, on the other hand, is a more dramatic and rare event where there is a reassortment of genetic material between different influenza A strains, typically of animal origin. This can result in the emergence of a novel subtype of influenza A virus with a completely different HA or NA protein. Antigenic shift events have the potential to cause pandemics because the human population has little to no pre-existing immunity against the new subtype.
While antigenic variation can occur in all three types of influenza viruses (A, B, and C), it is indeed more common in influenza A due to its ability to undergo both antigenic drift and antigenic shift.
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intrinsic tongue muscles are located entirely inside the tongue. these muscles act to change the shape of the tongue. group of answer choices a. both statements are true. b. both statements are false. c. the first statement is true; the second statement is false. d. the first statement is false; the second statement is true.
Answer: d
Explanation:
The intrinsic muscles originate and attach to other structures within the tongue.
There are four paired intrinsic muscles of the tongue and they are named by the direction in which they travel – the superior longitudinal, inferior longitudinal, transverse and vertical muscles of the tongue. These muscles affect the shape and size of the tongue – for example, in tongue rolling – and have a role in facilitating speech, eating and swallowing.
