7.
Which letter indicates a cell structure that directly
controls the movement of molecules into and out
of the cell?
1916
mags anivom glbige
A-
B-
C.
D-
VOL
A. A B. B C. C
olin W
D. D

Answers

Answer 1

The letter denotes a cell structure that directly regulates the entry and exit of molecules into cell D. How molecules enter and leave the cell is controlled by the cell membrane.

What type of cell structure directs the movement?

The cytoskeleton controls cell motion in addition to performing this structural function. These involve not only the movement of whole cells but also the internal movement through the cytoplasm of organelles and other structures, such as mitotic chromosomes.

A membrane is present in every cell, dividing the interior from the outside world. The plasma membrane or the cell membrane are two names for this membrane. The cell membrane is composed of a semipermeable lipid bilayer. The cell membrane regulates how materials are transported into and out of the cell.

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Related Questions

this process is used to record the electrical activity of the brain through the use of electrodes attached to the scalp:

Answers

An electroencephalogram (EEG) is a test that uses tiny, metal discs (electrodes) connected to the scalp to assess electrical activity in the brain.

Which phrase describes the procedure for capturing brain electrical activity?

a documentation of brain activity electrically. It is created by attaching electrodes to the scalp, the skin that covers the top of the head, and sending electrical impulses to a specialised device. The diagnosis of brain and sleep disorders may be made with an EEG. termed an electroencephalogram as well.

Which of the following phrases describes the process of logging brain electrical activity, according to this quiz?

Echoencephalography is the procedure of using electrodes affixed to the scalp to capture the electrical activity of the brain.

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Is another name for the larynx and the importance it plays in the human body?.

Answers

The larynx in the human body is also called as Voice Box.

The larynx is a hollow tube which is connected to the pharynx, also called throat which is in turn connected to the whole body. Larynx helps to swallow smoothly and it also contains vocal chords. These vocal chords vibrate which helps humans to speak through voice created by the vibrations.

Furthermore, larynx is also involved in other functions such as breathing, producing sound and protecting the trachea. This larynx contains three parts in its cavity called as vestibule, the middle, and the infraglottic space. Vestibule is the upper portion of the cavity followed by the middle and infraglottic space.

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a organ systems have been removed from the concept map allowed in the place of each organ system dragon drop major organ or tissue comprising the system

Answers

The neurological and endocrine systems regulate several bodily processes. Chemical messengers are used by these two regulatory systems to influence the operation of other organ systems and to synchronize activity across the body.

How are the various organ systems distinguished from one another?

An organ system is a collection of organs that collaborate to carry out a certain function, whereas an organ is made up of a set of tissues that work together to support the overall function of the organ.

Is it conceivable for a single organ to belong to several organ systems?

Some organs are a part of multiple systems. For instance, the nose functions as both a sensory organ and part of the breathing system.

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What larynx is called in the human body?.

Answers

The larynx in the human body is called as Voice Box.

The larynx is a hollow tube which is connected to the pharynx, also called throat which is in turn connected to the whole body. Larynx helps to swallow smoothly and it also contains vocal chords. These vocal chords vibrate which helps humans to speak through voice created by the vibrations.

Furthermore, larynx is also involved in other functions such as breathing, producing sound and protecting the trachea. This larynx contains three parts in its cavity called as vestibule, the middle, and the infraglottic space. Vestibule is the upper portion of the cavity followed by the middle and infraglottic.

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Resource partitioning can often be seen in similar species that occupy the same geographic area. These species avoid competition by living in different portions of the habitat or by utilizing different food or other resources and are called ____________ species.
sympatric

Answers

Resource partitioning can often be seen in similar species that occupy the same geographic area. These species avoid competition by living in different portions of the habitat or by utilizing different food or other resources and are called sympatric species.

If two related species or populations coexist in the same area and frequently interact, they are said to be sympatric in biology. A population that initially interbreeds before dividing into two or more separate species that coexist close to one another is an example of sympatric speciation. Due to reproductive isolation, which renders hybrid offspring incapable of reproducing and so limits gene flow, there may be genetic difference as a result of speciation. It is not required, but it is theoretically possible, for secondary contact to be linked to sympatric speciation or divergence in allopatry and range expansions that lead to an area of sympatry. As a result of secondary contact, interbreeding between sympatric species or taxa may or may not take place.

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What is the relationship between meiosis and genetic variation?.

Answers

The relationship between these two is Genetic variation is increased by meiosis.

I hope this helps!!!

the proccess of meiosis produces: question 2 options: 2 genetically identical daughter cells 4 genetically identical daughter cells 2 geneticall different daughter cells 4 genetically different daughter cells

Answers

Chromosomes cross across during prophase 1 of meiosis. The four daughter cells that are produced at the conclusion of meiosis are genetically different as a result of this process.

In meiosis, are there two or four daughter cells?

Two identical daughter cells are produced during mitosis, and both of these cells have the same amount of chromosomes as their parent cell. But during meiosis, four distinct daughter cells are produced, each of which contains half as many chromosomes as the parent cell.

What is the result of meiosis?

Meiosis is a type of cell division that results in the formation of four gamete cells and a halving of the parent cell's chromosome count. In order to reproduce sexually, egg and sperm cells must be produced.

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a complex organic molecule that is necessary for enzyme function but is not permanently associated with the enzyme is a:

Answers

Answer:

A coenzyme.

Explanation:

Non-protein catalysts facilitating an enzyme's chemical reactions are called "cofactors."  Cofactors that are organic molecules are called coenzymes.

when a light is shone into the pupil

Answers

When a light is shone into the pupil it should become smaller in size.

What is pupil?

The pupil can be described as the round opening  that can be seen in  the center of the iris  which is the colored tissue that is "eye color" and is located to the front of the eye however it posse the characteristics of changing size  when there is entering of light into the eye.

It should be noted that In the light reflex, the pupils can be seen to experience the constriction when light is been shone on the retina, however in a case whereby one eye only is stimulated,then the  two pupils will experience constriction, which canm be described as the  consensual reflex, though the afferents are optic nerve fibres  that can be seen to travel to both pretectal nuclei which go across the posterior commissure.

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complete question

When a light is shone into the pupil ----------------------------

one morphological feature of modern cetaceans is a vestigial pelvic girdle. if it is determined that cetacean lineage diverged from the artiodactyls' lineage after the divergence of pigs and other artiodactyla, then what should be true of the vestigial pelvic girdle of cetaceans?

Answers

It should be considered a shared derived character of the Cetacens.

What do you mean by Cetacens ?

Cetacens can be defined as an infraorder of aquatic mammals that includes whales, dolphins, and porpoises. The Characteristics include : fully aquatic lifestyle, streamlined body shape, often large size and exclusively carnivorous dietThey are separated into two groups: toothed and baleen whales. It should be considered a shared derived character of the cetaceans.They  are an order of mammals that originated about 50 million years ago in the Eocene epoch.

This is how the characteristics can be determined.

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the nucleocapsid is composed of multiple choice dna and rna and protein. dna or rna, and protein. protein located in the nucleus. nucleic acid in the ribosome. dna or rna, lipid, and protein.

Answers

The nucleocapsid is composed of DNA or RNA and protein.

In the cytoplasm, nucleocapsid assembly takes place. N, P, and L proteins, along with genomic RNA, make up the nucleocapsid. M is contacted by the nucleocapsid as it moves to the plasma membrane. Viruses emerge from the PM. Until extracellular, trypsin-like proteases cleave F0, virus particles containing the uncleaved form of the protein are not infectious.

Remember that the hydrophobic fusion peptide at the N-terminus of F2 is released during F cleavage, which is an essential maturation step for fusion to an uninfected cell.

The amino acid sequence at the cleavage site determines where in the cell the F cleavage occurs.

The F proteins of the measles and canine distemper viruses are cleaved in the ER/Golgi by cathepsin- or furin-like proteases. Thus, the infected animal is susceptible to these viruses in a variety of tissues.

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plasmids containing which combination of operator and promoter allow activation of gene expression in response to an added metabolite?

Answers

By turning on the so-called transcription factors, a class of DNA-binding proteins, signal transduction starts the transcription process.

The pace at which a gene is transcribed—the process by which RNA polymerase creates a messenger RNA—controls the majority of a gene's activity.

Which two procedures impact gene expression?

The two main procedures are transcription and translation. Gene expression is the result of both transcription and translation. The information contained in a gene's DNA is transferred to RNA (ribonucleic acid), a molecule comparable to DNA, in the cell nucleus during transcription.

Activators of transcription factors increase a gene's transcription. Transcriptional activity is suppressed. A gene can be turned on in particular body regions via clusters of enhancers, or transcription factor binding sites.

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On the lines provided, enter the name of the target organ(s) affected by the pituitary hormone indicated. Hypothalamic nerve call Posterior pituitary Anterior pituitary Growth hormone (GH) 10 Antidiuretic hormone (ADH) Adrenocorticotropic hormone (ACTH) Thyroid- stimulating hormone (TSH) Oxytocin (OCT) Prolactin (PRL) Gonadotropic hormones (FSH, LH) Melanocyte stimulating hgfa (MSH)

Answers

Produced by the anterior pituitary. It's regarded as a tropical hormone. Target cells are impacted by tropical hormones indirectly after being stimulated.

The anterior pituitary gland affects which organs?

The following organs, glands, and bodily tissues are affected by and interact with the anterior pituitary hormones: organs, muscles, and bones the growth hormone (GH). Adrenocorticotropic hormone: Adrenal gland (ACTH). thyroid hormone, which stimulates the thyroid gland (TSH).

What are the anterior pituitary gland's seven hormones?

Frontal pituitary

hormone adrenocorticotrophic (ACTH)

hormone that stimulates the thyroid (TSH)

Luteinizing agent (LH)

hormone that stimulates ovulation (FSH)

Prolactin (PRL) (PRL)

hormonal growth (GH)

MSH, or melanocytic-stimulating hormone

Because it releases hormones that regulate the thyroid, adrenal glands, ovaries, and testes, the pituitary gland is frequently referred to as the "master gland."

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major histocompatibility complexes (mhcs) are produced in the cell membranes of phagocytic cells of the immune system. what are mhcs made from?

Answers

MHC molecules are glycoproteins that are found linked to cells and help the immune system distinguish between self-antigens and foreign antigens.

Almost every cell contains MHC class I molecules, which enable T cells to keep an eye out for pathogen by monitoring the antigens inside the cell. In contrast, MHC class II molecules enable the immune system to react to antigens outside the cell. The purpose of MHC molecules is to bind and display pathogen-derived peptide fragments on the cell surface for recognition by the proper T lymphocytes.

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Use the equation from Question 4 and your answer to Question 2 to calculate the rate of ATP hydrolyzation, R. For step size, assume the vesicle is being transported by a myosin motor protein. (Hint: make sure you convert values to the appropriate units) The units for rate of ATP hydrolysis are s-1
Question 2 and 4 are as follows
2- Suppose your average velocity is 13.11 pixels/s. Given the fact that 1 um = 5.179 pixels, convert your average velocity to m/s. (Show your work.)
4- Write the definition of the rate of ATP hydrolyzation, R, in your own words. How would you calculate the rate of ATP hydrolyzation, R, if you know the step size of the motor protein, s, and the average vesicle velocity, v? Write the equation here

Answers

The rate of ATP hydrolyzation, is 13.11 and average velocity is 13.11 pixels/s is [tex]2,53 x 10 ^6 m/s[/tex] and ATP hydrolyzation, R,= 1.

Here will calculate the rate of ATP hydrolyzation, R.

[tex]1 4 ^ m - 5 * 179 pixels1 * 10 ^ - 6 * \\m = 5 * 179pixls\\1pixel = (10 ^ - 6)/(5 * 179) * m\\1pixel = 0.19 * 308 * 10 ^ - 6 * m\\1pixel = 1 * 9308 * 10 ^ - 7 * m13 * 1\\1pix*epsilon*l_ = 13 * 1 * 9308 * 10 ^ - 7 * \\m= 25 * 315 * 10 ^ - 7 *\\ m= 2.5313 * 10 ^ - 6 * \\matrix Average Velocity matrix = 13 * 11pixls / s\\= 2.5313 * 10 ^ - 6 * m / s[/tex]

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true or false? changes in our diet are accompanied by changes in the composition of our gut microbes, suggesting that our microbial populations are influenced by both environmental and genetic factors.

Answers

As stated in the above sentence, "changes in our food are accompanied by changes in the composition of our gut bacteria, demonstrating that our microbial populations are influenced by both environmental and genetic variables" is true.

Gut Microbiota:

Numerous pieces of evidence point to the gut microbiota's potential role in the emergence of obesity and its related comorbidities. It has been noted that the gut microbiota of obese and lean individuals differs, indicating that microbiome dysbiosis may be a factor in changes in body weight. Uncertainty exists regarding the exact processes by which the gut bacteria contributes to energy balance. Different dietary and lifestyle choices can have a beneficial or detrimental impact on the gut microbiota. It's interesting to note that complicated connections between nutrition, gut flora, and genetic makeup have also been linked to the likelihood of acquiring obesity and metabolic syndrome symptoms. Additionally, microbial metabolites have the ability to cause epigenetic alterations (such as adjustments to micro-RNA expression and DNA methylation), which may have an impact on one's health and susceptibility to obesity.

Additionally, microbial byproducts such membrane proteins or short-chain fatty acids may influence host metabolism by controlling hunger, lipogenesis, gluconeogenesis, inflammation, and other processes. In order to find new postbiotics with biological activity in the host and identify new targets and tools for inclusion in individualized therapeutics, metabolomic methods are being explored.

Therefore, Our gut microorganisms' makeup fluctuates along with changes in our food, indicating that environmental and genetic variables affect our microbial populations.

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How is the coordinated transcription of all the genes involved in a particular metabolic pathway brought about in eukaryotes?.

Answers

The genes all have the same combination of control elements in their enhancers is how  the coordinated transcription of all the genes involved in a particular metabolic pathway brought  is about in eukaryotes .

A fundamental concept in the regulation of gene expression in eukaryotes is the coordination of transcription and RNA processing. In the case of mRNA, coordination is primarily based on a co-transcriptional processing mechanism in which a developing precursor mRNA is matured by the transcription apparatus through cleavage and modification. The biosynthesis of rRNA is controlled by a similar process. However, it is still unclear how the transcription and processing of the relatively short tRNA transcript are coordinated. Human RNA polymerase III high molecular weight initiation complexes assemble on tRNA genes and convert precursor transcripts into mature forms. The removal of the 5' leader of the precursor tRNA by RNase P is one example of the co-transcriptional processing that these multifunctional initiation complexes might facilitate.

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if a splice site were mutated so that splicing did not take place, what would be the effect on the amino acid sequence?

Answers

If a splice site was altered, preventing splicing, the resulting effect just on mRNA would've been longer than usual.

a genetic change to the DNA sequence which takes place when an exon as well as an intron meet. This alteration may interfere with mRNA splicing, causing exons to be lost or added, and altering the protein-coding sequence. The spliceosome separates introns from the pre-mRNA during splicing, and exons are then spliced back together. The RNA will be translated into an inactive protein if the introns were left in place. A cis-acting splice element point mutation can vary whether an exon is skipped or included by altering how well or poorly it binds to splicing factors / inhibitors. A novel cis-acting element that is situated in the center of an exon or perhaps an intron can be created by a point mutation.

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What tool do geneticists use to determine the mathematical probability of the potential combinations of genotypes that can occur in offspring, given the genotypes of the parents?.

Answers

A Punnett Square is a tool that uses the genotypes of the parents to predict the probability of the possible phenotypes of their offspring.

The outward manifestations of desired traits are known as phenotypes. Phenotypes are the traits that result from the expression of genotypes.

Phenotypes also show the morphology or physiology that results from the presence of an allele combination.

In order to more systematically and precisely show phenotype in relation to genotype, scientists and individuals alike frequently draw a Punnett square.

This kind of tool is the most reliable and accurate. As a result of the successful fusing of the parental gametes, it also discloses the likelihood of the potential phenotypes of the offspring.

A Punnett Square, then, is a tool for estimating the likelihood of potential phenotypes in offspring based on the genotypes of the parents.

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All of the following cell components are found in prokaryotic cells EXCEPT
a. DNA
b. ribosomes
c. cell membrane
d. nuclear envelope
e. enzymes
d. nuclear envelope

Answers

With the exception of the nuclear envelope, prokaryotic cells have all of the following cell components.

What cellular elements are found in all prokaryotic cells?

All prokaryotes lack membrane-bound organelles but do have cytoplasm, ribosomes, a cell wall, and DNA. Polysaccharide capsules are also common. Diameters of prokaryotic cells range from 0.1 to 5.0 m.

Are prokaryotic cells DNA-based?

A free-floating, typically circular chromosome that is not protected by a nuclear membrane is seen in prokaryotic organisms, including bacteria. The nucleoid, a part of the cell, is where the DNA merely resides. Only prokaryotic cells have mesosomes, which are folded portions of the plasma membrane.

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Answer:

Nuclear envelope

Explanation:

Simpler answer to the one above.↑↑↑

one of the first mirna that was discovered by scientists involves the lin-4 gene of c. elegans. the product of the lin-4 gene is which of the following?

Answers

Because a miRNA is equivalent to the lin-14 mRNA, it prevents the lin-14 gene from being translated.

The proper timing regulation of many postembryonic developmental stages in C. elegans depends on lin-4. When LIN-14 protein levels are adversely regulated by lin-4, a temporal decline in LIN-14 protein begins during the first larval stage (L1).

MicroRNA primarily regulates gene expression by binding to messenger RNA in the cytoplasm of the cell. The designated mRNA will either be destroyed & its elements recycled, or it will be kept and translated later, rather than being promptly translated into a protein.

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After gel electrophoresis is complete for a crime scene sample, what must be done in order to analyze the results?.

Answers

Answer:  After the electrophoresis is complete, REMOVE the gel and casting tray from the electrophoresis chamber and VISUALIZE the results. No staining is necessary.

A typical human cell expresses about what portion of its protein-coding genes at any given time?.

Answers

A typical human cell expresses about 20% portion of its protein-coding genes at any given time.

What are Protein-coding genes ?

DNA sequences that are translated into mRNA and from which the appropriate mRNA molecules are translated into polypeptide chains are known as protein-coding sequences. In a protein coding sequence, known as a codon, one amino acid in the polypeptide chain is encoded every three nucleotides.

The bulk of RNA sequences come from protein-coding genes, according to the conventional theory. They are translated into messenger RNAs (mRNAs), which are then exported to the cytoplasm and translated into proteins.

In mRNA, each trio of nucleotides is referred to as a codon, and each codon designates a specific amino acid (hence, it is a triplet code). Thus, the chain of amino acids that makes up a protein is assembled in order using the mRNA sequence as a template.

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the arteries that branch from the aorta and provide oxygenated blood to the heart muscle itself are arteries. the arteries that branch from the aorta and provide oxygenated blood to the heart muscle itself are arteries. pulmonary capillary coronary systemic

Answers

Blood is delivered to your heart through the right and

left coronary arteries. They are the first arteries to branch off your body's major artery, the aorta.

Your heart muscle is surrounded by and contains your coronary arteries. They diverge from your aorta, the principal artery in your body. They begin at the aortic root, which is the first section of your aorta to leave your heart's left ventricle. Your heart's left ventricle is where oxygenated blood exits and begins to travel through your body. Your aorta has many branches, the coronary artery branches being the first.

cardiovascular artery anatomy

Two coronary arteries exist, and each has a number of branches:RCA: Right coronary artery Blood is delivered to your right atrium and right ventricle by the RCA (where deoxygenated blood goes before heading to the lungs). Its branches feed the atrioventricular (AV) and sinoatrial (SA) nodes.

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place the following structures in the order a bolus of food would pass through them - esophagus - jejunum - large intestine - ileum - ileocecal valve (a sphincter that separates two digestive regions) - pyloric sphincter - duodenum - rectum - oral cavity - stomach

Answers

Digestion is the process of converting complicated food particles into simple absorbable forms. The digestive system performs the procedure mechanically and biochemically.

When a food particle enters the body, it passes through the following anatomical structures:

1) The oral cavity

2) The esophagus

3) The stomach

4) The pyloric sphincter protects the stomach's entry into the duodenum.

5) The duodenum

6) Jejunum

7) Ileum

8) Valve ileocecal (a sphincter that seperates two digestive regions)

9) Small intestine

(10) Rectum

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Hom many chromoome would each new cell have after a human body cell divide by mitoi? i the new cell haploid or diploid

Answers

In humans, mitosis often results in two diploid cells. Since a diploid cell has both sets of homologous chromosomes, each of the two produced cells has the identical set of chromosomes as the parent.

The cell has two 46-chromosome groups when mitosis is finished, each encased in its own nuclear membrane. The cell then divides in two by a process known as cytokinesis, producing two clones of the original cell, each with 46 monovalent chromosomes.

A typical diploid human cell has 23 pairs of chromosomes, for a total of 46 chromosomes, half of which are of paternal and maternal descent. Haploid gametes with a single set of 23 chromosomes are created during meiosis.

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Why is it important for citizens to vote?.

Answers

Voting by the citizens of a country is essential because it gives citizens a chance to choose their government leaders, it allows them to voice their opinions on the public issues and also makes them realize the importance and power of their citizenship.

Voting is the process where a group of people raise their opinion, make a collective decision and express their point of view in the form of a decision or a representative or leader.

Government is the group of officials who are involved in running a country systematically. It is the authority that sets some rules for the country in order to make it organized. A government usually consists of legislature, executive, and judiciary.

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1 eq br2 acetic acid draw the structure(s) of the major organic product(s) of the following reaction.

Answers

Br2 = +1 eq. acetic acid. The concept of stereochemistry is not required. Draw each significant product that is conceivable, if there are any. For each of the following reactions, identify the main organic product. (Minor or inorganic side products don't necessarily need to be drawn.) Br2. Br + NaOH + hv.

What does food acetic acid do?

Vinegar, which includes 4 to 18% acetic acid, is primarily made up of acetic acid. It serves as a food ingredient and preservative (known as E260)

What are the adverse effects of acetic acid?

The most frequent adverse reactions to acetic acid are moderate stinging or burning at first use.

Serious adverse reactions from acetic acid can include hives, breathing problems, and facial swelling.

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downy hair similar to peach fuzz that grows on the body to counteract the heat loss associated with a lack of insulating subcutaneous fat is/are called: group of answer choices endorphins lanugo amenorrhea hypothyroidism

Answers

Lanugo is called downy hair similar to peach fuzz that grows on the body to counteract the heat loss associated with a lack of insulating subcutaneous fat develops by the end of 16 weeks of the fetus's development.

Some babies have lanugo, which is body hair. The earliest type of hair to emerge from hair follicles is this unpigmented, downy hair. Except for the palms, lips, and bottoms of the feet, it can be found everywhere over a baby's body. Around the fourth or fifth month of pregnancy, most fetuses start to develop lanugo.

On the bodies of human embryos as they develop in the womb, lanugo, a type of fine hair, grows. When vellus hairs take their place, either at birth or soon after, these hairs vanish. Although thicker than lanugo hairs, vellus hairs are also naturally thin and translucent.

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What happens when you have low enzyme production?.

Answers

Answer:

your body can't break foods down so that nutrients can be fully absorbed

Explanation:

Without them, your body can't break foods down so that nutrients can be fully absorbed. A lack of digestive enzymes can lead to a variety of gastrointestinal (GI) symptoms. It can also leave you malnourished, even if you eat a nutritious diet.

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