The respiratory bronchioles in humans are defined as having a diameter less than 0.5 mm. Since they lack cartilage, they must rely on inhaled.
What respiratory organ has the biggest diameter?The largest airway is the trachea, or windpipe. The left and right bronchi, which connect to the two lungs, are two smaller airways that emerge from the trachea. The right lung has three lobes while the left has two. Each lung is divided into these lobes.
The trachea is larger than the bronchi, right?The trachea, also referred to as the windpipe, is a tube that most humans have that is around 4 inches long and less than an inch in diameter. Beginning just below the larynx (voice box), the trachea descends behind the breastbone (sternum).
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describe the difference between high soil water potential and low soil water potential. which is better for a thirsty plant root?
High soil water potential is better for thirsty plant roots.
What is the difference between between high soil water potential and low soil water?high soil water potential have higher concentration of water molecule where as low soil potential have low concentration of water molecule.
soil water potential is the sum of four different components: gravitational potential+ The matric potential+ the pressure potential=the osmotic potential .The matric potential is the most significant component as far as soil is concerned because it relates to the water that is adhering to soil surfaces. Water potential of root cells is higher than water potential of soil.
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Why does fluid leave capillaries at their arteriolar end and enter at the venular end?.
Because of the hydrostatic pressure of the blood, fluid is forced out of the arteriolar ends of the capillaries and into the interstitial spaces of the tissues. Water then returns to the venular ends of the capillaries through the process of osmosis.
What are capillaries?Capillaries are a type of blood vessel that are very thin and can be found all over your body. They deliver blood as well as nutrients and oxygen to the cells that are found in your organs and other body systems. Your capillaries are the blood vessels in your circulatory system that are the tiniest.
Because of the hydrostatic pressure of the blood, fluid is forced out of the arteriolar ends of the capillaries and into the interstitial spaces of the tissues. Water then returns to the venular ends of the capillaries through the process of osmosis.
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which statements are examples of cell signaling? carbon dioxide diffuses across the cell membrane into the blood plasma. after an injury, plate
Soil bacteria assemble and develop fruiting bodies when food is in short supply. After an injury, platelets create growth factors that encourage the division of adjacent cells.
Multicellular organisms are made up of cells that transmit, receive, and react to a range of signals.
Specific protein signal molecules outside the cell are bound by specialized cell surface proteins.
The phospholipids in the cell membrane allow protein signal molecules from outside the cell to diffuse within. A change in membrane proteins caused by signal molecules activates other proteins in the cell. A cell changes its structure, activity, or behavior in response to the message sent by signal molecules.
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The hiv virus attacks only a certain type of white blood cells, and not other cell types. Why?.
The virus needs to bind to a specific molecule on the cell surface, known as CD4, to access the cell. Therefore, it binds to a specific cell type .
What do you mean by HIV Virus ?
HIV can be defined as a virus that attacks the body's immune system. If not treated well it can lead to AIDS.It belongs to a class of viruses which is usually known as retroviruses. It uses RNA to encode their genetic information rather than DNA, as human cells do.Symptoms include Fever, Chills. Rash, Night sweats , Muscle aches.HIV treatment (antiretroviral therapy or ART) involves taking medicine as prescribed by a health care provider.To know more about HIV from the given link
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What five things are true of all minerals?.
Answer:
Solid - All minerals will be solids at normal temperatures on Earth.
Naturally occurring - Minerals occur in nature. Solids that are made in a chemistry lab don't count as minerals.
Inorganic - Minerals don't come from plants, animals, or other living organisms.
Fixed chemical structure - Specific minerals will always have the same chemical formula. They will have the same combination of elements.
Crystalline structure.
by increasing heart rate, raising blood pressure, and irritating the heart, smoking can trigger an irregular heartbeat known as .
Atrial fibrillation (A-fib) is a heart rhythm disorder that can cause blood clots in the heart because it is an irregular and frequently highly rapid heartbeat. A-fib raises the danger of heart problems such heart failure and stroke.
"Heart failure" is characterised by a rapid, erratic heartbeat.
Heart failure is the condition in which the heart is unable to sufficiently pump blood through the body to treat its problems. Breathlessness, extreme fatigue, and leg edoema are common symptoms and adverse effects.
A number of scientific experiments have demonstrated that as physical stress increases, calcium release also increases, boosting cardiac contractions to help the heart pump more forcefully against rising blood pressure.
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What is the meaning of chronological order?.
Chronological order is the order wherein the occasions occurred, from first to last.
Chronological order sorts according to when the event occurred. Here are a number of real-life examples arranged in chronological order: autobiography. biography.
Types of chronological order:
Chronological OrderSequential OrderConsecutive OrderWithout a strong sense of chronology of when events occurred and in what chronology, students are unable to examine the relationships between them or explain historical causal relationships. A chronology provides a mental framework for organizing historical thinking.
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a bacterial cell that divides and produces two daughter cells gives its genetic material to both daughter cells. this is an example of horizontal gene transfer.
A bacterial cell that divides and produces two daughter cells and gives its genetic material to both daughter cells is an example vertical gene transfer.
What is vertical gene transfer?The inheritance of the parental gene to the progeny is referred to as vertical gene transfer. Prokaryotes, including bacteria and archaea, reproduce asexually by cell division or budding to produce identical progeny/daughter cells. The offspring cells' chromosomes are identical to those of the parent cells.
What is of horizontal gene transfer?
The movement of genetic material between unicellular and multicellular organisms without using DNA transmission from parent to offspring is known as horizontal gene transfer often referred to as lateral gene transfer. HGT has played a significant role in the evolution of numerous creatures.
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The sympathetic division of the ans is also called the ______ division as it arises from the thoracic and lumbar regions of the spinal cord.
The sympathetic division of the autonomic nervous system, ANS, is also called the thoracolumbar division as it arises from the thoracic and lumbar regions of the spinal cord.
What is the autonomic nervous system, ANS?The autonomic nervous system, ANS, is the branch of the peripheral nervous system that regulates involuntary actions in the body.
The autonomic nervous system, ANS, controls normal physiological processes such as heart rate, blood pressure, respiration, digestion, and sleep.
The autonomic nervous system, ANS, is made up of two divisions and they are:
Sympathetic divisionParasympathetic divisionThe sympathetic division of the autonomic nervous system is active under conditions of stress or perceived danger and prepares the body to respond accordingly by increasing the heart rate hence, blood pressure increases as well, increasing the respiratory rate, dilating the pupils, etc.
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both the pcr and the dna sequencing reactions were performed in a thermocycler machine. how did these two kinds of reactions differ?
The difference between PCR and DNA sequencing were performed in a thermocycler machine is the main function of the process. PCR (Polymerase Chain Reaction) amplifies oligonucleotides by adding nucleotides. Meanwhile, DNA sequencing elongates structures of the DNA. Both can be done in the same vial. We just need the ssDNA template added.
PCR uses a single oligonucleotide to multiply the same DNA strands. Using a thermocycler machine, there is a couple of series needed in a particular order:
Denaturing: separate oligonucleotide into two strands of DNA.
Annealing: nucleotides were added to each of the DNA strands.
Synthesizing: using Taq DNA polymerase, each of the DNA strands was gathered.
Repeat the cycle 20 - 40 times.
DNA sequencing is a process of elongating one strand of DNA primer using a DNA template. Nucleotides were needed in this process.
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if diploid cells in cats (felis catus) typically contain 76 total chromosomes, how many total chromosomes will a cell contain after completion of both meiosis i and ii?
After Meiosis I and II, the cat will have 38 chromosomes.
A cat has 38 pairs of chromosomes, or 38 X 2 = 76 chromosomes. In the process of meiosis I, the two daughter cells of the cat will have 38 chromosomes as at the end of this process, each cell will have half the number of chromosomes. The chromosomes in the diploid cell resegregate to form haploid cells. Here, crossing over or recombination of genetic material occurs.
During meiosis II, the sister chromatids separate to form two different cells, forming four haploid cells. Here the dividing cell has only one set of homologous chromosome. No DNA replication occurs in this process. Thus, there are 38 chromosomes at the end of this process.
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The hypothesis would not have been supported by the data if traits independently assorted in approximately a 9:3:3:1 ratio. The traits for white fur and red eyes were always inherited together. All the f1 offspring had the same phenotype.
The traits for white Fur and red eyes were always inherited together - The traits for white fur and red eyes were always inherited together. All the f1 offspring had the same phenotype.
According to the law of independent assortment, inheritance of one trait has no bearing on inheritance of another. In other words, genes are inherited separately from one another.
What is the meaning of Phenotype ?The term "phenotype" describes a person's observable characteristics, such as height, eye color, and blood type. Both a person's genomic make-up (genotype) and environmental circumstances affect their phenotype.
Examples of Phenotypes ;
eye hue.Hair hue.Height.Your voice's tone.certain illnesses.a bird's beak's size.Tail of a fox is how long.color of a cat's stripes.To know more about Phenotype please click here ; https://brainly.com/question/902712
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Answer:
B
Explanation:
Suppose that for a certain gene, nearly 100 percent of the normal level of expression is required to produce the normal phenotype. Based on this requirement, one could predict that a _________ mutation would be _________.
Suppose that for a certain gene, nearly 100 percent of the normal level of expression is required to produce the normal phenotype. Based on this requirement, mutation would be dominant if the loss of function happens.
what is mutation?
Changing an organism's DNA sequence is known as a mutation. An infection with a virus, exposure to mutagens, or mistakes in DNA replication during cell division can all cause mutations.
If the loss-of-function allele is present, the wild type allele might not make up for it. In those circumstances, the heterozygote will have a phenotype identical to that of the loss-of-function mutant, and the mutant allele will take on a dominant role.
Let's say that the normal phenotype of a gene requires roughly 100% of the normal amount of expression. This condition allowed one to predict that a loss of function mutation would predominate.
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What is drug resistance?1. When microbes begin to tolerate an antimicrobial agent at a level which would normally be inhibitory2. when microbes synthesize a compound that combines with a drug3. when a host cannot tolerate the side effects of a particular drug
Drug resistance is defined as when microbes begin to tolerate an antimicrobial agent at a level which would normally be inhibitory.
What is drug resistance? Drug resistance is the decline in a medication's ability to effectively treat a condition or disease, such as an infection or cancer. When referring to resistance that viruses or malignancies have "acquired," that is, when resistance has evolved, the word is utilized.Drug-resistant infections are mostly brought on by the improper use and overuse of antibiotics. The proliferation of bacteria, some of which may be resistant to antibiotic therapy, is encouraged by a lack of clean water, proper sanitation, and effective infection prevention and control.For more information on drug resistance kindly visit to
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Why are bacteria hypothesized to be the first type of organisms on planet
earth-think what type of environment earth was 2.5 billion years ago and
the three sub groups of the Kingdom Archeabacteria and how they get
their energy and where they live.
Your answer
The earliest living things on Earth were bacteria. They first appeared in the first oceans' water three billion years ago. Only anaerobic heterotrophic bacteria existed initially. Recently, fossilized bacteria from 3 billion years ago, before the oxygenation of the Earth's atmosphere, was discovered by geologists.
Bacterial species evolve swiftly because of their enormous populations, which provide numerous opportunities for mutations, as well as the ease with which they effortlessly share genetic information, even among species. A thick atmosphere first formed on Earth 500 million years ago as gases rose up from the planet's core. Water vapour, nitrogen, carbon monoxide, and carbon dioxide were all part of our planet's gaseous outer layer for a few billion years. Water vapour condensed into massive oceans throughout the course of countless ages, creating the ideal environment for the earliest forms of life.
Thus, we might draw the conclusion that geologists were the ones who uncovered the theories of fossilized bacteria from 3 billion years ago, before the Earth's atmosphere became oxygenated.
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why would a dialysis unit (artificial kidney) use isotonic concentrations of nacl , kcl , nahco3 , and glucose in the dialysate?
The dialysis contains isotonic amounts of sodium chloride, potassium chloride, sodium bicarbonate, and glucose to keep the blood's concentrations of these different ions and glucose at normal levels when waste products are eliminated.
The peritoneal dialysis is purposefully made hyper-osmolar relative to plasma in order to establish an osmotic gradient that favours net water transport into the peritoneal cavity, which is necessary to meet the ultrafiltration requirements of patients receiving peritoneal dialysis. Glucose acts as an osmotic agent in commercially available peritoneal dialysates to improve ultrafiltration. Dextrose is available in concentrations ranging from 1.5% to 4.25%. Water causes the dialysate's theosmolality to decrease over time.
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Does proliferation mean growth?.
Cell proliferation is the process that leads to an increase in cell number and is defined by the balance between cell division and cell death or cell loss through differentiation. Cell growth is synonymous in biology when it comes to cell division.
How is cell proliferation measured?In addition to total metabolic activity, cell proliferation can be measured by examining one or more specific markers within the cell. A well-known example is the BrdU incorporation assay. In this assay, cells are treated with BrdU, a thymidine analogue that is incorporated into DNA during cell proliferation.
What does proliferation mean?Proliferation is the rapid multiplication of parts or an increase in the number of something. Nuclear proliferation is the rapid increase in nuclear weapons. Biological proliferation often leads to overpopulation problems and ecological imbalances.
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What type of mutation occurs in cystic fibrosis?.
Gene mutations occurs in cystic fibrosis.
Cystic fibrosis is caused by mutations in the gene that produces the cystic fibrosis transmembrane conductance regulator (CFTR) protein.
In people with CF, mutations in the CFTR gene can disrupt the normal production or functioning of the CFTR protein found in the cells of the lungs and other parts of the body. Cystic fibrosis is an example of a recessive disease. That means a person must have a mutation in both copies of the CFTR gene to have CF.
Cystic fibrosis is an inherited disease characterized by the buildup of thick, sticky mucus that can damage many of the body’s organs. The disorder’s most common signs and symptoms include progressive damage to the respiratory system and chronic digestive system problems. The features of the disorder and their severity varies among affected individuals.
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Which one of the following reasons is not typically why athletes strive for lower body weight and lower body fat?.
To improve appearance is the the following reasons is basically not typically why the athletes strive for the lower body weight and the lower body fat
Body fat Typically, male athletes will have between 6-13% body fat, and female athletes will have 14-20% body fat. In this post, discover how to calculate body fat percentage as well as the typical body fat percentages of different athletes. Men and women need different amounts of fat. For a man, 2–5% fat is essential, 2–24% fat is considered healthy, and more than 25% classifies as obesity. For a woman, 10–13% fat is essential, 10–31% fat is healthy, and more than 32% classifies as obesity. The reduction of non-essential body fat contributes to the development of muscle and cardiorespiratory endurance, speed and agility. Added body weight (in the form of non-essential fat) increases the athlete's resistance to movement, and the athlete increases muscle contractile force per given workload.
Question seems incomplete the complete question is :
Which one of the following are the reasons which is not typically why the athletes strive for the lower body weight and the lower body fat?
A. To feel better
B. To improve appearance
C. To enhance performance
D. To qualify in a lower weight category
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Your brain is not constantly bombarded with signals telling it that you are wearing socks. This is because the touch receptors around your ankle are
phasic receptors and fast adapting
This is due to the phasic receptors, quickly adjusting touch receptors that surround your ankle.
What are the sensory receptors that keep track of joint position?Muscles, tendons, joint ligaments, and joint capsules all include proprioceptors. For bodily proprioception, there are no specialized sensory receptor cells. While exquisite touch ascends via the posterior column pathway, rough touch ascends via the anterior spinothalamic pathway.
What kind of receptor responds to pressure, strain, and vibration?Because their plasma membranes physically deform, mechanoreceptors can detect stimuli. They have mechanically gated ion channels, and pressure, contact, stretching, and sound cause the gates to open or close.
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What are the 4 types of warm-up?.
The 4 types of warm-up are
Fast-paced walking.Walking up and down stairs.Fast-paced side stepping.Jogging on the spot.Preparing physically and mentally for your chosen activity is the goal of warming up before physical action. As you warm up, your heart rate and blood flow rise, allowing more oxygen to reach your muscles. The connections between your nerves and muscles are also activated and primed during a warm-up, which increases movement efficiency. Dynamic stretching should also improve your flexibility and range of motion.
Hence, warm-up increases movement efficiency.
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Which of the following do you expect if an individual is heterozygous for the sickle-cell trait? see conceptA. they will not develop sickle-cell diseaseB. they will show some symptoms of the disease because the allele that causes sickle-cell disease is not really recessiveC. they will be more apt to acquire a serious case of malariaD. they will have full-blown sickle-cell disease because the allele is dominantE. none of the listed choices are correct
An individual who is heterozygous for the sickle-cell trait will display some disease symptoms (Option-b). It is a widespread illness.
The sickle cell trait is what?Red blood cells with sickle cell disease are distorted, losing their characteristic circular shape.
Sickle cell disease is a genetic condition brought on by mutations that can be passed down through the generations.
Because sickle cell disease is a codominant condition, heterozygous people who have both normal and defective alleles express it.
Therefore, compared to normal homozygotes, heterozygotes are more resistant to the incapacitating effects of malaria. In many sickle-cell carriers, this heterozygote advantage outweighs the severe reproductive disadvantage of the more uncommon sickle-cell homozygotes.
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What are the 5 steps of translation in order?.
In the cytoplasmic "pool" of amino acids, tRNAs bind to free amino acids.The ribosome receives the particular amino acid carried by tRNA.
Based on complementary pairing of a triplet code (anticodon) with a triplet code (codon) of the mRNA, the tRNA "delivers" its amino acid in translation phase.
An enzyme creates a peptide link by "hooking" the final amino acid in the chain to the one before it. Each tRNA carries its associated amino acid into the protein chain and adds it to the translation phase growing chain.
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which domain of the a-b toxin binds to cell surface receptors on the host cell? which domain of the a-b toxin binds to cell surface receptors on the host cell? a domain a-b toxins do not bind to cell surfaces. b domain both the a and b domains have the ability to bind to cell surface receptors.
Cell surface receptors can be bound by both the A and B domains (option -b).
Which component of the AB toxin binds to the host cell's cell surface receptors?The binding/translocation domain (B-domain) of AB-toxins, in addition to the enzyme domain (A-domain), interacts specifically with a cell-surface receptor and aids in the toxin's internalization into cellular transport vesicles like endosomes.
Transferring plasmids from one bacterium to another causes lysogenic conversion. Because of the viral infection, lysogenic bacteria are inherently less virulent than non-lysogenic bacteria. The A component of A-B exotoxins binds to the host cell receptor to allow the B component to enter the cell.
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in the picture above, the big w is in ocean water, while the little w is in water in a bay cut off from the ocean by the bar indicated by the pink dashed arrow. a stream flows toward the bay along the blue arrow, and coastal bluffs are indicated by the dashed yellow arrow. what probably happened here? group of answer choices the navy dammed the stream valley to keep enemy submarines from sneaking in and launching missile attacks on the secret underground base under the stream. sediment has been eroded from the land by waves crashing against the bluffs, and the sediment has been transported along the shore by longshore drift to build the bar. sediment supplied by the stream has piled up to build the bar that separates the stream from the ocean. a sinkhole opened behind the beach, and the stream slumped into the hole, leaving the bar.
Where rivers cannot support it, glaciers piled up sand and gravel, and ultimately the Cape will vanish beneath the waves.
Because they feature a strong swash and a weak backwash, constructive waves help build up coastlines. In bays with shallow water and gentle waves, sandy beaches are typically found. Where cliffs are being eroded and where there are stronger waves, pebble beaches frequently form. Later, it was changed to Good Hope to draw more travelers to the southern African coast-passing Cape Sea Route. Over time, the Cape developed into an important port and waypoint for sailors sailing from Europe to Asia.
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3.winogradsky columns form oxygen concentration gradients. predict the distribution of oxygen throughout the column
Over time, an oxygen grade develops from high at the top to fully anoxic( no oxygen) at the bottom of the column. The overlying air has the loftiest oxygen attention, and the attention decreases as you move down to the bottom of the column.
When a column is set, oxygen is unevenly distributed throughout the column. It's consumed by respiration throughout the column, but it's only produced in the photosynthetic subcaste at the top. Any oxygen that diffuses down into the deposition from the top reacts with chemical composites in the bottom.
The Winogradsky column, a fashion developed beforehand in the history of microbial ecology to enrich soil microbes, may thus be a useful model system to probe both microbial and viral ecology.
The Winogradsky column is used to view the microbial ecology of the soil and water of a lake or sluice. The column is useful in being suitable to cultivate microorganisms effectively for further study of ecology.
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The non-leukocyte tissue cells known as ________ produce leukotrienes and prostaglandinsin response to allergen binding. A) neutrophilsB) basophilsC) monocytesD) lymphocytesE) mast cells
The answer is the E. Mast cells
Leukocytes or white blood cells are part of the immune system which functions to protect itself from infection or disease. White blood cells are produced from hematopoietic stem cells in the bone marrow.
Mast cells are a type of white blood cell. Mast cells are formed in the bone marrow. These cells then spread throughout the body by way of the blood to the appropriate tissues and out of the blood vessels. Mast cells will react when a foreign object enters the body as part of the immune system. Mast cells will produce leukotriene and prostaglandinsin responses to allergen binding.
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what term applies to a microbe that can synthesize all of its cellular constituents from a simple carbon source and inorganic salts?
Microbes that can synthesis all of their cellular components from a straightforward carbon source & inorganic salts are known as autotrophs.
What are autotrophs and how do they synthesize food?
An organism that uses carbon from simple things like carbon dioxide and energy from light or inorganic chemical processes to make complex organic compounds (such carbohydrates, lipids, and proteins) is known as an autotroph.
An organism that can produce its own food from simple organic materials, such as most plants and some microorganisms, requires only minerals as nutrients for growth and uses carbonate or carbon dioxide as a carbon source and simple inorganic nitrogen as a source of nitrogen. The energy needed for this process is obtained from photosynthesis.
Types of autotrophs are-
1. Photoautotrophs 2. Chemoautotrophs
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The measurement of ________ compares the density of urine to the density of water.
The measurement of specific gravity compares the density of urine to the density of water.
What exactly is specific gravity?
Relative density, also known as specific gravity, is the ratio of a substance's density (mass per unit volume) to the density of a given reference material.
Specific gravity is almost always measured in relation to water at its densest (at 4 °C or 39.2 °F); for gases, the reference is room temperature air (20 °C or 68 °F). In scientific circles, the term "relative density" (often abbreviated r.d. or RD) is often preferred, whereas the term "specific gravity" is frowned upon.
If the relative density of a substance is less than one, it is less dense than the reference; if it is greater than one, it is denser than the reference. The densities are equal if the relative density is exactly one; that is, equal volumes of the two substances have the same mass.
If water is used as the reference material, then any substance with a relative density (or specific gravity) less than one will float in it. An ice cube, for example, with a relative density of about 0.91 will float. A substance that has a relative density greater than one sinks.
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The division of the autonomic nervous system that is short‐lived and very localized is.
Preganglionic fibers, a subdivision of the autonomic nervous system, are comparatively small and highly specialized.
What categories does the autonomic system fall under?The sympathetic and parasympathetic limbs of the autonomic nervous system are its two divisions. The parasympathetic system is referred to as the "rest and digest" phase, and the sympathetic system is connected to the "fight-or-flight" response. The harmony between the two systems is called homeostasis.
Sympathetic nervous system: In times of stress or danger, this system activates bodily functions that support you.
Your autonomic nervous system has a parasympathetic nervous system, which functions in opposition to your sympathetic nervous system.
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