Plants and photosynthetic algae both are producers in relation to their position in a food chain.
Producers also termed as autotrophs, they make their own food. They are on the first position of every food chain. Plants and photosynthetic algae are the organism that can produce their own food by using the materials from organic sources, like- sunlight, carbon dioxide etc. Therefore, they can be called as producers or autotrophs in relation to their position in a food chain. They formed the base of an energy pyramid of ecosystem.
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the first fossils of animals with hard parts appeared about 541 million years ago. what percentage of geologic time does the fossil record represent? express your answer as a percentage with two significant figures
The percentage of geologic time in the fossil record represents 20%.
Remains or traces of previously living things are referred to as fossils. Skeletons, aquatic animal skins, and human and animal imprints on stone are a few examples. The preserved remnants or traces of extinct animals, plants, and other species are known as fossils. Because they demonstrate that earlier life on Earth was distinct from the species present now, fossils are crucial pieces of evidence for evolution. Body fossils (bones and exoskeletons), trace fossils (feces and footprints), and chemofossils are examples of parts of an organism that is typically only partially preserved as fossils (biochemical signals). Paleontologists can classify fossils to establish their evolutionary links between organisms and age them using techniques like radiometric dating.
Therefore, 20% of geologic time is represented in the fossil record.
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what is a function of the skeletal system? multiple choice question. produce movement protect the body from pathogens produce hormones house blood-producing cells
function of the skeletal system Protecting the body from pathogens
An organism that infects its host with disease is referred to as a pathogen, and the severity of the disease symptoms is referred to as virulence. Pathogens include viruses, bacteria, unicellular and multicellular eukaryotes, as well as other taxonomically diverse organisms. Pathogens, such as bacteria that are targeted by specialist viruses known as phages, impact every living thing.
There are a staggering amount of bacteria and viruses on the planet, and they live in almost every environment. A litre of surface seawater typically has 100 billion viruses and more than ten billion bacteria. According to estimates, there are 1031 viruses on Earth, which is roughly ten billion times as many as there are stars in the universe.
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Active neurons need ATP to support which of the following?
A) the movement of materials to the soma by axoplasmic transport
B) the synthesis of neurotransmitter molecules C) the movement of materials from the soma by axoplasmic transport
D) the recovery from action potentials
E) all of the above
active neurons need ATP for all the process like movement of materials to the soma by axoplasmic transport, the synthesis of neurotransmitter molecules, the movement of materials from the soma by axoplasmic transport and the recovery from action potentials
In both neuronal and extracellular tissues, ATP serves as a ubiquitous signaling molecule. It is produced and kept in the nerve terminals, glial cells, and postsynaptic target cells, and it is released in response to neuronal activity and a number of other stimuli (activation of pre- and postsynaptic receptors, metabolic distress, inflammation, hypoosmotic stimuli, and cellular damage). Ionotropic P2X and metabotropic P2Y receptor subtypes, which are found in abundance in the nervous system, are acted upon by ATP in a variety of ways. A number of central and peripheral synapses have been found to express ATP as a rapid transmitter, and these synapses do so through P2X receptors.
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rats are given a drink of green, licorice-flavored water and then later injected with a drug that makes them nauseous. the next day they are given a choice between multiple forms of water. which ones are they most likely to avoid?
Based on behavioral psychology the next day when the rats are given a choice between multiple forms of water, they are most likely to avoid the licorice-flavored water.
Based on the rat's experience and the study of adjunctive behavior, the rat would probably blame the licorice-flavored water for making them queasy, or they would assume that the queasy feeling occurs after drinking the licorice-flavored water, so they would probably avoid it and opt for the green water. Adjunctive behavior is an excessive pattern of activity that emerges as a result of a sporadic time-based reinforcement schedule.
Animals are known to associate their behaviors with either pleasant or unpleasant emotions in behavioral psychology. Every animal's behavior is naturally conditioned to seek out pleasure and steer clear of suffering.
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The list shows steps in the process of ocean water becoming salty. Number the statements from 1 to 4 to
describe this process from the start to finish.
________ Rivers carry minerals to the ocean.
________ Water containing minerals flows into rivers.
________ Water from rain dissolves minerals in rocks.
________ Over time, the salt concentration of ocean water increases.
The process of ocean water becoming salty is as follows
Rivers carry minerals to the ocean.
As rivers flows over the rocks containing soluble minerals, some of them get dissolved in the water. Thus, rivers carry many nutrients from land to the ocean.
Water containing minerals flows into riverswater that flooded carry's minerals .It releases minerals that are carried away to streams and river
Water from rain dissolves minerals in rocksAfter a heavy rainstorm, rainwater that falls on land dissolves minerals in rock and soil river. It discharge increases due to surface Gravity pulls river water downhill toward the ocean. Then over time, he salt concentration of ocean increases.
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photoreceptors of the eye include rods and cones. which one is responsible for interpreting color; which can function only under conditions of high light intensity?
The photoreceptors which responsible for interpreting color and function under conditions of high light intensity is cone cells.
Cone vs Rod cellsThe retina is filled with 150 million light-sensitive cells. Photoreceptors are the cells in the retina that respond to light. There are two types of photoreceptors : cone and rod photoreceptors.
Cone photoreceptors are located in the central portion. It contains proteins named photopsins. Cones are activated by bright light and aid the eye to see color. There are 3 subtypes of cones : blue, red and green, which each of them sensitive to various wavelengths of light. For example : Red light stimulate the red cones.
Rod photoreceptors are sensitive to low-light levels. It assist the eye in night vision and seeing in black and white. In a dim room, we use mainly our rods. The protein contained in this photoreceptor is called as rhodopsin. This photoreceptors are more numerous in the periphery of the retina.
Signals from the photoreceptors are sent through the optic nerve to the brain for processing.
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muscle function differences between patients with bulbar and spinal onset amyotrophic lateral sclerosis. does it depend on peripheral glucose?
Between ALS patients with spinal onset and those with bulbar onset, no appreciable changes in blood AP and glucose levels were found. However, in patients with spinal onset ALS, a statistically significant positive connection was seen between the mean values of both chemicals.
What is bulbar onset ALS?
Lou Gehrig's disease, also known as amyotrophic lateral sclerosis (ALS), is a complex illness that can present itself in a variety of ways; each case is different. The area of the body where ALS first manifests itself can differ from person to person. Bulbar-onset ALS is characterized by the onset of symptoms in the neck or face. This name derives from the "bulbar" area of the brain, which regulates facial and neck muscles as well as functions like swallowing and speech.
Hence the answer is, the muscle function differences depend on peripheral glucose.
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A virus is an infectious agent that typically consists of a nucleic acid molecule in a protein coat, is too small to be seen by light microscopy, and is able to multiply only within the living cells of a host.
Apply your knowledge of cell types, structures, and functions to explain why viruses are not considered cells.
Viruses cannot be considered cells because of the following reasons:
1) Viruses, unlike cells, lack a structural membrane. It only has a protein coat with genetic material inside, whereas a cell has a cell wall and a cell membrane with various proteins on the membrane that allow molecules to be transferred.
2) The virus is not growing. It functions as a non-living entity in the absence of a host. After attaching to a host, it uses the host cell machinery to perform all of its tasks and replicate itself, whereas a cell can perform almost all of its important functions on its own and can grow in size and shape.
Cells are the basic structural and functional unit of an organism which is responsible for various metabolic activities. It consists of a cell membrane, cell organelles, nucleus with genetic material and cytoplasm. Viruses are just genetic material covered with protein coat which neither shows any metabolic activities like growth or homeostasis nor it live by itself as it requires the host's body to replicate its genetic material.
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click to select the potential routes of microbial contamination for both organic and conventional crops.
Pathogens introduced at several phases of production, including soil, bio - fertilizers, irrigation water, manure, people handling, animals, and wildlife, can infect fresh produce farmed using conventional and organic farming techniques.
Risk refeeding: What is it?Refeeding syndrome is the term used to describe the potentially deadly changes in fluid and electrolyte levels that can happen in malnourished individuals getting mechanical refeeding These modifications are brought on by hormonal and metabolic alterations and may result in severe clinical issues.
What happens during refeeding?The refeeding process happens when an undernourished person increases their calorie intake after going for an extended length of time with little to no meals.It is a crucial stage in your child's recovery from an eating disorder.
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enhancers and silencers are? enhancers and silencers are? are dna elements where transcription factors bind are proteins that control gene expression are cis-acting proteins must be transported in to the nucleus after translation trans-acting sequences that interact with rna polymerase
A cis-regulatory series that will increase the pastime of a gene while certain via way of means of transcription elements is referred to as an enhancer, even as a series that reasons a lower in gene pastime is referred to as a silencer.
Regulatory DNA factors consisting of enhancers, silencers and insulators are embedded in metazoan genomes, and that they manage gene expression in the course of development. Although they fulfil special roles, they percentage precise properties. Silencers are regulatory DNA factors that lessen transcription from their goal promoters.
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Which skin appendages aid in cooling the body to prevent overheating on a hot day or during intense exercise?.
eccrine sweat glands.Eccrine sweat glands are the major sweat glands found abundantly on the skin especially in palms
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blood flow is largely regulated at a tissue level. which of the following could be said regarding this process? a. a rise in the blood level of o2 will result in vasodilation b. a raised co2 level results in vasodilation c. acidaemia directly increases vasopressin (adh) release d. a raised co2 blood level will result in an increased serum alkalinity
option b is the right for this a raised co2 level results in vasodilation
Is CO2 a vasodilator or vasoconstrictor?Most previous studies indicate that the vasoactive action of CO2 is dependent on the initial PAP; during basal tone condition, CO2 is a mild vasoconstrictor, whereas at high pulmonary vascular resistance, it is a potent vasodilator
What causes vasodilation?Vasodilation occurs when the smooth muscle located in the blood vessel walls relax. Relaxation can be due to either removal of a contractile stimulus or inhibition of contractility.
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If a triplet on template DNA is AAA, what will be the anticodon on tRNA
a. UUU
b. AAA
c. TTT
d. AUG
The anticodon on tRNA will be AAA if the triplet on the template DNA is AAA. AAA will be translated to UUU in mRNA if it is found on the template strand of DNA.
The tRNA that would bind to this mRNA has the anticodon sequence AAA. Since AAA is the tRNA anticodon sequence, option B is the appropriate response. A three-nucleotide structure known as an anticodon has the same three bases as an mRNA codon. Each tRNA molecule has a distinct anticodon triplet sequence that can be utilized to make three different amino acid codons by pairing three complementary bases with one or more amino acid codons. Because of wobble base pairing, anticodons can only couple with a single codon.
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The meninges are protective membranes that surround the brain. CSF is a liquid found within the meninges that help to protect and cushion the brain, increasing its buoyancy. If a tear occurs in the meninges, CSF will begin to leak, leading to:
A hole or tear in the dura, the top layer of the meninges, causes a CSF leak. The hole or rip may have been caused by a head injury, brain injury, or sinus injury.
Which of the following qualifies as a blood–brain barrier fundamental characteristic?The majority of organs and tissues have capillaries, which are slightly leaky and open to the passage of many different substances. The blood brain barrier is a crucial component of the brain's capillaries , which are less permeable due to their very high density of tight junctions.
What kind of cell types are responsible for touch perception?Touch is transmitted through piezo channels by Merkel cells, which are touch-sensitive cells. There are various types of sensory receptor cells in the Merkel cell-neurite complex.
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in angiosperms, the process of ensures that the endosperm will develop only in ovules containing a fertilized egg. a) cytogenesis b) fragmentation c) double fertilization d) meiosis
In angiosperms, the process of double fertilization ensures that the endosperm will develop only in ovules containing a fertilized egg.
The angiosperms plants' distinctive property is double fertilization. Pollen grains are left on the stigma of the pistil or carpel after pollination. A pollen tube is created when the pollen grain on the stigma germinates. Two male gametes are released when the pollen tube that contains them descends through the pistil's style and enters the ovule's embryosac.
One of the gametes combines with the egg to create the zygote. The other male gamete fuses with the embryo sac's two polar nuclei. Triple fusion is the name given to the fertilization between two polar nuclei and one male gamete. Upon triple fusion, triploid primary endosperm cells are produced (3n).
The complete question is:
In angiosperms, the process of _________ ensures that the endosperm will develop only in ovules containing a fertilized egg.
a) cytogenesis
b) fragmentation
c) double fertilization
d) meiosis
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The presence of many red blood cells in the urine during a microscopic examination is known as ________.
Blood in the urine is known as hemoturia. Gross or visible hematuria refers to the presence of crimson or pink urine, which may indicate the presence of blood in the urine. The term "microscopic" hematuria refers to hematuria in which blood occasionally occurs in the urine but is difficult to detect since it can only be seen under a microscope.
Why are there red blood cells in the urine?The presence of more RBCs than usual in the urine could be caused by: cancer of the bladder, kidneys, or urinary system. issues with the kidneys and the rest of the urinary system, like infections or stones. kidney damage or inflammation. prostate issues
What does urine with tiny blood mean?A typical sign of glomerulonephritis, an inflammation of the kidneys' filtering system, is microscopic urinary bleeding. Possibly, glomerulonephritis.
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what led to the commercialization of personal genomic products? a. the increase in understanding of genetics and decrease in price of mapping a genome. b. the decrease in understanding of genetics and increase in price of mapping a genome. c. increased awareness of genetics thanks to the human genome project. d. increased demand for genetic mapping products.
The increase in understanding of genetics and decrease in price of mapping a genome.
The Genetic Code Project was ordered for what reason?The Genome Project (HGP) was indeed a 13-year, multinational undertaking that ran from 1990 to 2003.The full sequence of DNA bases with in human genome and the discovery of all human genes—which would make them available for future biological research—were the main objectives.
What were the human genome projects' primary objectives?Accurately sequencing the human genome's 3 billion nucleotide base pairs was one of the project's objectives.The identification and mapping of every human gene found inside the DNA sequence was a secondary objective.
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The internal energy within a system associated with the motion of particles and that can be added to a substance is called _____.
Intrinsic energy is energy that is added to a substance.
What kind of energy go into a system's internal energy?The chaotic, random motion of molecules is known as a system's internal energy; a system's total (internal) energy is made up of both potential and kinetic energy.
What is the internal energy of the system when heat transfer and work are both happening at the same time?The system's heat is equal to the internal energy. Because heat is neither created nor destroyed, when the ambient temperature rises, the system's temperature falls. The system becomes exothermic and negative as a result of the removal of heat.
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Is the study of biological diversity and the evolutionary relationships among organisms.
The study of biological diversity and the evolutionary relationships between organisms is called phylogenetics.
Classification is a way of grouping and categorizing based on certain characteristics. One type of classification by looking at the characteristics of the species in which the classification system of living things based on kinship relationships that occur between organisms and adjusted based on the evolutionary process is called phylogenetic classification.
The phylogenetic system is based on how closely related organisms or groups of organisms are. Organisms that are closely related have more characteristics in common than organisms that are more distantly related. Such as morphological, anatomical, physiological, and behavioral features.
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how did the addition of aldosterone affect urine volume (compared with baseline)? can the reabsorption of solutes influence water reabsorption in the nephron? explain. how well did the results compare with yourprediction?
Aldosterone increases salt and water reabsorption while decreasing urine volume and increasing potassium output.
Aldosterone supplementation reduced urine volume, which led to an increase in salt and water reabsorption and an increase in potassium secretion. Since water flows along an osmolarity gradient, the reabsorption of solutes affects the reabsorption of water in the nephron. This was as I had anticipated.
In rats experiencing diabetes insipidus, aldosterone reduces apical AQP2 expression while increasing urine output.
To increase the quantity of salt (sodium) absorbed back into the bloodstream as well as the quantity of potassium expelled in the urine, it acts on organs like the kidney and colon. This plays a key role in the control of blood pressure.
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compare the urine volume in your baseline data with the urine volume as you increased the blood pressure. how did the urine volume change?
The urine volume increased proportionally.
An increase in blood pressure while the valve was closed reduced glomerular filtration rate but had no effect on glomerular pressure. However, there was no urine output. When the blood pressure was raised while the valve was closed, the glomerular filtration rate was primarily affected. Because there was no urinary output, the glomerular filtration rate decreased.
Blood pressure is the force of blood pushing against by the artery walls. Arteries are vessels that carry blood from the heart to certain other parts of your body. High blood pressure, also known as hypertension, is characterized by blood pressure that is higher than normal. Your blood pressure fluctuates throughout the day as a result of your activities. Having blood pressure readings that are consistently higher than normal may lead to a diagnosis of high blood pressure.
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in pea plants, the purple allele is sufficient for making purple flowers, even if one of the homologous chromosomes carries the white allele. which of the following statements are true in this case? select all that apply.
In the pea plant experiment, since the purple allele is sufficient in making purple flowers that means it is dominant in the first progeny.
Gregor Mendel was a 19th-century pioneer of genetics who today is remembered almost entirely for two things: being a monk and relentlessly studying different traits of pea plants. Born in 1822 in Austria, Mendel was raised on a farm and attended the University of Vienna in Austria's capital city.
In his pea plant experiment he took seven different traits of pea plant such as - tall, dwarf, white, yellow, wrinkled, round, purple. He performed true breeding - means capable of producing one and only one type of offspring, such as when all daughter plants are round-seeded or axial-flowered.
He observed that the parent generation was the P generation, and it included a P1 plant whose members all displayed one version of a trait and a P2 plant whose members all displayed the other version. The hybrid offspring of the P generation was the F1 (filial) generation. The offspring of the F1 generation was the F2 generation.
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What must happen to a newly made polypeptide before it can be secreted from a cell?.
A newly synthesized polypeptide's signal sequence must direct it to the ER, from which it travels to the Golgi, in order for the cell to secrete it.
The creation of a fresh polypeptide is the consequence of which process?A messenger RNA molecule is produced during transcription utilizing DNA as a template. After the mRNA molecule leaves the nucleus, the translation process starts at a ribosome in the cytoplasm to create a polypeptide.
What transpires when a polypeptide is put together?The cell builds proteins during translation by using an mRNA strand that it recently transcribed from its genetic code as a template. This just got transcribed by the cell.
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what does the combination of the hot, dry summers and abundance of dry vegetation do to the chaparral ecosystems? prone to fires
Dense evergreen bushes, moderate, moist winters, and scorching, dry summers define the chaparral habitat.
Which statement is not true for the climate of the so. cal. chaparral? The chaparral, sometimes referred to as shrubland, is made up of a number of dense thickets of little trees and drought-tolerant, evergreen sclerophyll plants. Chaparral is a type of woodland with dry soil, warm temperatures, and short, resilient bushes. The chaparral biome is dominated by small woody plants as opposed to tall trees or grasses. Chaparral is only found on the Pacific coast of North America. In sections of California and northern Mexico, where the climate is similar to that of the Mediterranean region with hot, dry summers and warm, wet winters, the majority of the chaparral can be found.A geographical feature known as "chaparral" that is mostly found in the U.S. state of California, southern Oregon, and the northern region of Mexico's Baja California Peninsula is a shrubland plant community. Its Mediterranean environment, which features hot, dry summers and warm, wet winters, as well as infrequent, intense crown fires, shape the region. In contrast to the adjacent soft-leaved, drought-deciduous scrub community of coastal sage scrub, which is frequently found on drier, southern-facing slopes within the chaparral biome, summer-drought-tolerant species are present in chaparral.Learn more about chaparral refer to:
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The van der waals equation is a modified version of the gas equation that takes into account both the forces between gas particles and the real molecular of the gas particles.
Van der Waals equation is a modification of the ideal gas law and takes into account both the volume of the gas molecules and the attractive forces acting between them.
Van der Waals equation is an equation relating the relationship between the pressure, volume, temperature, and amount of real gases.
For a real gas containing 'n' moles, the equation is written as;
( P + a n 2 V 2 ) ( V − n b ) = n R T.
Where, P, V, T, n are the pressure, volume, temperature and moles of the gas.
Ideal gas equation is equally valid for any gas, on the other hand the van der Waals equation contains a pair of constants (a and b) that change from gas to gas.
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Cecropias are known for the mutualistic relationship they have with which creature?.
It is commonly known that cecropias and creature ants interact mutualistically.
What purpose does the cecropia moth fulfill?The adult stage of the cecropia moth exists primarily for mating and egg-laying. Cecropia moths must survive as adults on the fat reserves they stored while they were caterpillars. They are essentially toothless and only have a brief lifespan.
How rare are cecropia moths?The cecropia moth has not been assessed by the International Union for Conservation of Nature, but it doesn't seem to be too rare in the United States. In the spring or summer, you might be able to catch one on a maple or birch tree.
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Which of the following terms would best describe the
bones that make up your vertebrae?
A flat bones
B irregular bones
C short bones
D long bones
what are the structural and functional distinctions between the rough and smooth endoplasmic reticulum?
SER is mainly involved in lipid formation and it doesn’t have ribosomes on its surface whereas RER forms proteins and its surface has ribosomes on it.
The smooth endoplasmic reticulum's primary jobs include lipid synthesis, fat molecule packaging, steroid hormone metabolism, and detoxification. Production and packaging of protein molecules is its primary duty. The main distinction is that the SER surface appears smooth because there are no ribosomal structures on it, whereas the RER surface appears rough because there are many ribosome molecules there.
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identify the blood vessel tunic which contains the specialized simple squamous epithelium called the endothelium. the endothelium is continuous throughout the entire vascular system, including the lining of the chambers of the heart.
The tunica intima, is the tunica of the blood vessel that contains the specialized simple squamous epithelium called the endothelium. The endothelium is continuous throughout the vascular system, including the lining of the heart chambers.
The Role of the Intima Tunica in the Vascular SystemThe tunica intima is a layer of the vascular system that contains the simple specialized epithelium, called the endothelium. This layer extends throughout the vascular system, including inside the heart's spheres.
The endothelium is extremely important for cardiovascular health, as it forms part of the barrier between the blood and the tissue cells surrounding the blood vessels. This layer protects tissue cells from the presence of toxic factors in the blood. In addition, it is responsible for maintaining the homeostasis of the cardiovascular system by regulating blood pressure and blood flow.
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The _______ are white, membranous folds attached by muscle to the thyroid and arytenoid cartilages of the larynx on their outer edges. The inner edges are free, allowing oscillation to produce sound.
true vocal folds
The muscles that make up the vocal folds' actual body are known as thyroarytenoid. By dragging the vocal folds' arytenoid (back) end toward their thyroid (front) end, they shorten the vocal folds.
What is the purpose of the thyroarytenoid muscle?The muscles that make up the vocal folds' actual body are known as thyroarytenoid. By dragging the vocal folds' arytenoid (back) end toward the thyroid (front) end, they shorten the vocal folds.
Who or what names the vocal folds?Vocal folds (also known as vocal cords) are extraordinary organs that act as an airway valve and vibrate to produce voice. The vocal folds are multilayer organs made up of a muscle and a mucosal layer. The area between both the two vocal folds is known as the glottis.
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