The plasma membrane is selectively permeable. Plasma membrane is also known as cell membrane.
What is Plasma membrane? The plasma membrane is also known as the cell membrane. The primary function of the plasma membrane is to protect the constituents of the cell from the outside environment. They are primarily composed of lipids and proteins that exhibit selective permeability. The plasma membrane is selectively permeable, keeping track of which components enter and exit the cell. The plasma membrane's four primary functions are identification, communication, regulation of solute exchange across the membrane, and isolation of the cytoplasm from the external environment. The plasma membrane is mostly made up of phospholipids, which are made up of fatty acids and alcohol. The phospholipids in the plasma membrane are organized in two layers, known as a phospholipid bilayer, with a hydrophobic (water-hating) interior and a hydrophilic (water-loving) exterior.To learn more abut plasma membrane:
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Under a light microscope, cyanobacterial heterocysts are observed to be larger and have thicker walls than other cells in the filament. this is to protect the heterocyst from?
Under a light microscope, cyanobacterial heterocysts are observed to be larger and have thicker walls than other cells in the filament. this is to protect the heterocyst from exposure to oxygen.
What are cyanobacterial heterocysts?
Some filamentous cyanobacteria, including Nostoc punctiforme, Cylindrospermum stagnale, and Anabaena sphaerica, produce specialized nitrogen-fixing cells known as heterocysts or heterocytes during nitrogen shortages. Using the enzyme nitrogenase, they fix nitrogen from dinitrogen (N2) in the air to provide the filament's cells the nitrogen they need for biosynthesis.
Since oxygen inactivates nitrogenase, the heterocyst needs to establish a microanaerobic environment. The distinct physiology and structure of heterocysts necessitate a broad alteration in gene expression.
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Which of the following identifies a problem associated with pesticide use?
Crop yield decreases
Costs decrease for farmers
O Pesticides pollute the environment
Only the targeted pests are affected
Answer:Properly applied, pesticides contribute to higher yields and improved product quality by controlling weeds, insects, nematodes, and plant pathogens. In addition, herbicides reduce the amount of labor, machinery, and fuel used for mechanical weed control.
Explanation:
Some fungi can can grow as either yeasts or molds depending on environmental conditions.
a. true
b. false
Yes, this is truetrue that some fungi can grow as yeast or molds depending on environmental conditions.
What is fungi and its characterstic? Where does it found?Fungi are eukaryotic ,non vascular and heterotrophic organisms. They may be unicellular or filamentous . They produce by means of spores. They exhibit the phenomenon of alteration of generation . Fungi are found in just about any habitat but most live on the land ,mainly in soil or on plant material.
Yeast can grow in moist environments where there is a plentiful supply of simple, soluble nutrients such as sugsugarsars and amino acids . For the reason they are common on leaf and fruit surfaces ,on roots and in various types of food.
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What muscles does the tubing (shoulder) internal rotation exercise primarily target?
The interior process training targets the subscapularis muscle which is a very important strength of the rotator cuff. The rotator cuff muscles support to equip strength for the shoulder joint.
What causes pain in the subscapularis muscle?The most common causes of subscapularis tendinitis are sports injuries or direct trauma to the arm, such as when someone falls and hits their shoulders or arms. After a medical operation, such as a shoulder replacement surgery when the subscapularis tendon is excised and reconstructed, a rupture of the tendon may also happen. The subscapularis muscle, which arises from the subscapular fossa and inserts at the lesser tubercle of the humerus, is a sizable and potent triangle-shaped muscle. The name of the muscle is derived from its position beneath the scapula: sub (under) scapula (wing bone). The subscapular fossa of the scapula houses the triangular subscapularis shoulder muscle. It is one of the four muscles that make up the rotator cuff, together with the supraspinatus, infraspinatus, and teres minor. It attaches between the scapula and the proximal humerus.To learn more about subscapularis muscle, refer to:
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Find the density of a substance that has a mass
of 44 grams and a volume of 4 cubic centimeters.
Density Mass/Volume
A. 91 grams/cubic centimeter
C. 176 grams/cubic centimeter
B. 40 grams/cubic centimeter
D. 11 grams/cubic centimeter
The Density of the substance is 11 grams/ cubic centimeter.
Density is the ratio of mass and volume of the substance. It is given by the given formula,
Density = Mass / Volume
Here, Mass = 44g
Volume = 4 cubic centimeter
On substituting the given values in the formula,
Density = 44g / 4 cubic centimeter
Density = 11 grams/ cubic centimeter
Hence, the Density of the substance is 11 grams/ cubic centimeter.
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Photosynthesizing leaves are the source of ____________ which is actively transported to the ____________ within the phloem.
Photosynthesizing leaves are the source of sugar which is actively transported to the seive tube
within the phloem.
What do organisms that produce photosynthesis use?Carbon dioxide (CO2) is used by photosynthetic organisms as their primary source of carbon, and this molecule is reduced during photosynthetic reactions. Actually, adding carbon dioxide to microalgae is recognized as a suitable method for increasing microalgal production.
The glucose is prepared by the source by photosynthesis , it is converted to sucrose . The sugar is then moved in form of sucrose into the companion cells and then into living phloem, seive tube cells by active transport.
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In the case study from this chapter, it was assumed that nelson mcgrath had too much _________ in his brain, which has been linked to schizophrenia.
In the case study from this chapter, it was assumed that nelson mcgrath had too much ___Dopamine______ in his brain, which has been linked to schizophrenia.
What is schizophrenia ?Schizophrenia is a severe mental illness in which reality is perceived by sufferers strangely. When combined with hallucinations, delusions, and severely disordered thought and behaviour, schizophrenia can have a crippling effect on daily functioning.
Delusions, hallucinations, confused speech, disorganised behaviour, and the so-called "negative" symptoms are the five main categories of schizophrenia symptoms. The pattern and severity of schizophrenia symptoms, however, differ greatly from person to person.There is no known precise cause of schizophrenia. According to research, a person may be more susceptible to acquire the illness if a combination of physical, genetic, psychological, and environmental factors are present. Because certain people are predisposed to schizophrenia, a difficult or upsetting life event could set off a psychotic break.Learn more about Schizophrenia here:
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Why does the glycolytic pathway occupy a central position in cellular metabolism?
Three main modes of carbohydrate metabolism, the glycolytic pathway, the pentose phosphate shunt, and the citric acid cycle, operate in the fetus, each predominating at different stages of fetal development.
Experiments performed on rat embryos explanted during the second trimester (New, 1978) and on isolated rat hearts (Clark, 1973) show that the fetus consumes significant amounts of glucose and lactate during the early stages. and have been shown to be relatively tolerant to hypoxic concentrations. Be. This means that the glycolytic pathway predominates at this stage of pregnancy. It has been shown that later in development, the citric acid cycle becomes more dominant and embryos are much more susceptible to reduced oxygen tension.
Since it is unchanged and glycolysis itself does not generate CO2, the source of CO2 may be glucose metabolism via pentose phosphate shunts. This signaling pathway is particularly active when tissues are growing rapidly.
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In Town X, the water has heavy metal M. In Town Y, the water has heavy metal N. Residents of both towns drink the water with no issues.
However, in Town Z, the water has both metal M and N, and the residents have long-term kidney damage. What conclusion can be made about the two metals?
O More metals cause acute effects but not chronic effects
O The first metal causes an acute effect compared to the other.
O The heavy metals have a synergistic relationship when combined.
O The heavy metals have an antagonistic relationship when combined.
The conclusion that can be made about the two heavy metals is that:
The heavy metals have a synergistic relationship when combined; option CWhat are heavy metals?Heavy metals are metallic elements that has a relatively high density and are toxic or poisonous at low concentrations when they enter the body.
Some examples of heavy metals are mercury, arsenic, chromium, lead, cadmium, etc.
A common example of heavy metal poisoning is in lead poisoning of water.
Considering the effects of the presence of a heavy metal M or N in the drinking water of Town X, Y or Z.
Residents of Town X and Town have no issues with their drinking water despite the presence of the heavy metal M and N in their water respectively. However, residents of Town Z whose drinking water has M and N in their water have long-term kidney damage. This implies that M and N together, enhance their effects or have a synergistic relationship.
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hhhhheeeeeellllllllpppppppp
A - Ammonia
B - Hydroxide
C - Hydrogen
D - Oxygen
I think this is it
In which portion of a sample of whole blood will you find the antigens that determine an individual's abo blood type?
ABO typing is the designation for the blood grouping test. Antibodies against type A and type B blood are combined with a sample of your blood. The sample is next examined to determine whether or not the blood cells adhere to one another. Blood reacting with one of the antibodies causes blood cells to adhere to one another.
What is Blood group ?According to the presence or absence of antibodies and hereditary antigenic compounds on the surface of red blood cells, blood is classified according to its type. Depending on the blood group system, these antigens could be proteins, carbohydrates, glycoproteins, or glycolipids.
The four varieties of human blood are A, B, AB, and O. The letters on a red blood cell's surface are an antigen or protein of a particular type. For instance, Type A blood carries antigens known as A-antigens on the surface of red blood cells.Learn more about Blood group here:
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According to darwin, what was the role of naturalists in the context of behavioural research?
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When a substrate and enzyme interact, the first chemical species formed is the _____.
Answer:Your answer is the enzyme-substrate complex
Explanation:
Please help! The question is in the picture.
Answer:The value of p is less than the value of Q
Explanation:Q is much denser than p
According to distance decay, which of these cities would have the least interaction with New York City?
A. Nashville
B. Las Vegas
C. Chicago
D. Washington DC
E. Atlanta
According to the distance decay, the city that would have the least interaction with New York City would be Las Vegas, option B is correct.
Why is The least likely to interact with New York?Las Vegas, in the United States, is known around the world for its grandiose casinos, luxurious hotels and huge and famous illuminated signs. This luxury city is located towards the west coast of the United States. This means that the city lies on the opposite side of the country from New York. Distance decay indicates that the likelihood of interaction decreases with distance.
With this information, we can conclude that New York City has the least interaction with Las Vegas given that of the cities listed in the options, It is the furthest in terms of distance.
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Why does the use of a salt solution in kimchi act as a preservative against bacterial decay?
Isotonic solution between salt and Kimchi cabbage limits the growth of microorganisms during in the brining process and creates an environment in which lactic acid bacteria (LAB) that can withstand high levels of sodium can take control of Kimchi fermentation.
How does salt preserve the freshness of kimchi?The veggies are breaded (salted) to eliminate the water in order to keep the food and enable the flavours to penetrate it over time. The final salt content ranges between 2 and 5%. Generally, kimchi is fermented by 'wild microorganisms,' which are normally found on vegetables.
Because salt reduces the moisture content of foods, it is beneficial as a preservative. The amount of releasing accessible for microbial growth.
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At a follow-up visit, the client is informed that her breast cancer has recurred. the nurse knows that which situation places the client at risk for developing bone metastases?
According to the statement the nurse the patient at risk for developing bone metastases Recurrence within 2 years of the original diagnosis.
The correct option is A.
Briefing:Local recurrence could be a sign of systemic disease in the future, especially if it happens within two years of the first diagnosis. Throughout the absence of cancer systemic disease, local recurrence is aggressively treated with surgery, radiation, as well as hormone therapy. A range of factors, including the duration of recurrence from either the original diagnosis or the history of earlier treatments, influence overall prognosis and appropriate treatment.
What causes breast cancer?Breast cancer, like all cancers, is caused by DNA abnormalities that encourage your cells to explode out of control. In this situation, it targets breast tissue cells, and there is no one cause of these DNA alterations.
Is it possible to treat metastatic breast cancer?Metastatic breast cancer has no cure. It is impossible to eradicate cancer cells after they have spread to some other part of the body. However, the correct treatment plan might help you live longer and live better.
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I understand that the question you are looking for is:
On a follow-up visit, the patient is informed that her breast cancer has recurred. The nurse knows which of the following situations places the patient at risk for developing bone metastases?
a) Recurrence within 2 years of the original diagnosis
b) No maternal family history of breast cancer
c) Aggressive treatment, including surgery, radiation, and hormonal therapy
d) Previous therapeutic response to chemotherapy
A scheme of thought that has survived a test of detailed examination for long periods of time is a (an)?
A scheme of thought that has survived a test of detailed examination for long periods of time is a Scientific Law Because first of all the scheme of thought must be something theoretical, hence the option Model will get rejected.
And the scientific theory is just based on 2-3 observations and the scientific Law is a thing that must be applied to all the observations related to it.
Hence it should survive a detailed examination.
scientific law is a rule that describes a pattern in nature.scientific theory is a scientific explanation of observations and evidence supported by many tests.hypothesis is an educated guess.To know more about Scientific Law visit : https://brainly.com/question/15189105
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An aeolipile
is a device powered by
steam. When heated,
water in the bulb
produces steam. The
bulb rotates as the
steam escapes from the
nozzles. People were
making these devices
as long as 2,000 years
ago. How do you think
they came up with the
idea even though they
aeolipile
did not have our modern understanding of
science? State your claim. Provide evidence
support the claim, and explain your reason
Though the understanding of modern science eluded ancient inventors, they were never without the understanding of elementary science such as mathematics. The practical applications of mathematics were utilized in the development of aeolipile.
The famous Library of Alexandria was in its heyday during Heron's time, and Heron is thought to have lectured in the Museum of Alexandria, a meeting place for scientists and academics. It is in these gatherings pertinent and prevailing subjects such as Architectural equipment for lifting huge items, techniques of calculating surfaces and volumes - including a way of computing the square root, war machines, and light manipulation utilizing reflection and mirrors are all examples of inventions.
Rather than focusing on numerical connections and arcane, abstract mathematical concepts, he investigated the practical applications of mathematics. Evidence supporting this claim was the number of inventions that came around the time the aeolipile was invented. These inventions include A coin operated 'Holy Water Dispenser'; A water organ; Heron's Fountain (an instrument that used air pressure to produce a jet of water); The Dioptra (a surveying device); A primitive, programmable robot (automaton) and a fire engine.
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In brain development, _________ are times of peak development when the environment has an especially strong effect; as the architecture of the brain t
In brain development sensitive periods are times of peak development when the environment has an especially strong effect; as the architecture of the brain.
It may be easily shaped, the developing brain is extremely receptive to experience and stimuli. A healthy brain will develop in an environment that is stimulating, but stress and adverse childhood experiences (ACEs) can alter the brain in ways that affect behavior and learning ability.Your brain reaches its optimum functioning at age 25 after the enormous development spurts of childhood and adolescence. It is also the finest it has ever been at storing, cross-referencing, and recalling information. It weighs around 1.3 kg and is at its heaviest point.To know more about brain visit:
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Is the initial activation of the receptors, whereas is the process of organizing and interpreting the information in the brain.
The sensation is the initial activation of the receptors, whereas perception is the process of organizing and interpreting the information in the brain.
Our nervous system is responsible for detecting stimuli and producing a response. There are generally five senses all of which have receptors that can sense environmental stimuli. When these receptors sense any information, sensation occurs. These sensations are sent to the brain in the form of electrical impulses, often called action potentials, to produce a perception. The process of converting the energy of stimulus into action potentials is called transduction. It is the first step toward perception.
Perception is the process that processes the sensations and understands the information. Perception then produces the final view of any sensation. For example, sensation produces the effect of various external stimuli like that of smoking. Perception helps us to recognize the smell of the smoke.
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How do d-amino acids differ from l-amino acids? what biological roles are played by peptides that contain d-amino acids?
L amino acid is capable of rotating plane polarized light anticlockwise and D is capable in rotating clockwise
What does amino acid D stand for?In non-ribosomal physiology, D-amino acids, which are chiral forms of L-amino acids, are known to be useful. Life appears to select one of the enantiomers for biological functions, despite the fact that all proteinogenic amino acids—aside from glycine—have chiral versions.
The main difference between L and D is that L is amino acid is the enantiomers of an amino acid which is capable of rotating plane polarized light anticlockwise or the left hand side whereas D amino acid is the enantiomers of an amino acid which is capable of rotating plane polarized light in clockwise.
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13. Which process is represented by the arrow in the diagram
Energy Available
for Use by
Living Organisms
Energy
Stored in
Food
A. growth
B. respiration
C. regulation
D. excretion
Answer:
B
Explanation:
because respiration
is the breathing in and breathing
out.
Why origins of replication along a chromosome tend to start at sites with stretches of a and t nucleotides?
The origins of replication along a chromosome tend to start at sites with stretches of a and t nucleotides because-
The positions at which the DNA helix is first opened are referred to as replication origins (parent 5-29). In easy cells like those of micro organism or yeast, origins are designated with the aid of DNA sequences numerous hundred nucleotide pairs in length. This DNA consists of brief sequences that appeal to initiator proteins, in addition to stretches of DNA which can be particularly smooth to open. We noticed in discern four-4 that an A-T base pair is held together by fewer hydrogen bonds than a G-C base pair. consequently, DNA wealthy in A-T base pairs is extraordinarily clean to drag aside, and areas of DNA enriched in A-T pairs are generally found at replication origins.In order to form a replication bubble, the DNA has to be unbound. DNA contains 4 nucleotides A, T, C, and C. A and T basepairs via 2 hydrogen bonds and C and G base pairs with 3 hydrogen bonds, so basepairing between C and G is stronger compared to Basepairing between A and T, so it is easy to break hydrogen bonds between A and T compared to G and C so origin of replication contains A and T nucleotides compared to C and C nucleotidesTo know more about Origin of replication visit : https://brainly.com/question/13685752
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Relate the structure of the cell (plasma) membrane with organic compounds.
Carbohydrates, proteins, phospholipids, and lipids are the organic compounds that structure the cell membrane. The glycocalyx is that the term helpful to describe the carbohydrate coating on the cell surface, which is involved in cell-cell adhesion, protecting the cell surface from chemical damage. The membrane proteins are responsible for the most dynamic processes carried by the membranes. Lipids are providing the essential structure of the cell membrane. Phospholipids are generally made up of from four fatty acids, alcohol, phosphate, and alcohol with phosphate.
The lipids, proteins, phospholipids, and lipids that structure the cell membrane are all organic substances. The term "glycocalyx" is beneficial to describe the carbohydrate coating on a cell's surface that aids in cell-cell attachment and shields the surface from chemical deterioration. The foremost dynamic processes carried out by membranes are controlled by membrane proteins. The elemental structure of the cell membrane is provided by lipids. Four fatty acids, alcohol, phosphate, and alcohol with phosphate are the most components of phospholipids.
The plasma membrane is another name for the cell membrane. It shields the cell and its cellular constituents from the surface world. It controls the flow of chemicals into and out of the cell and is selectively permeable. A cell's cytoplasm is surrounded by a skinny, semi-permeable membrane referred to as the cell membrane (plasma membrane). By letting some chemicals into the cell while blocking others, it serves the aim of preserving the integrity of the cells interior. The upkeep of cellular integrity and the transportation of molecules inside and outside the cells are the two most crucial roles performed by the cell membrane.
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What must occur before tropomyosin can shift, revealing the active sites that allow myosin heads to bind to the actin filaments?
Tropomyosin must change conformation, uncovering the myosin-binding site on an actin molecule and allowing cross-bridge formation. This can only happen in the presence of calcium, which is kept at extremely low concentrations in the sarcoplasm.
In order to reveal the myosin-binding site on an actin molecule and allow the development of a cross-bridge, tropomyosin must modify its conformation. Only in the presence of calcium, which is maintained in the sarcoplasm at incredibly low amounts, is this possible.
According to the sliding filament theory, muscle proteins slide past one another to produce movement during muscular contractions.
The sliding filament theory postulates that during muscle contraction, the actin (thin filaments) and myosin (thick filaments) of muscle fibers glide past each other while remaining at essentially constant lengths.
The myosin binding sites at the Actin filament are covered with the tropomyosin molecules which undergo conformational changes due to the attachment of the troponin to the calcium ions released from the sarcoplasmic reticulum during contraction and thus contraction of muscles takes place.
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Hiv contains an outer membranous ____________ beyond its capsid that helps attach to ____________ on the host cell surface.
HIV contains an outer membranous envelop beyond its capsid that helps attach to receptors on the host cell surface.
HIV or Human Immune Virus is a contagious, parasitic virus that destroys the immune system of its host. If left unchecked, it could develop into AIDS (Acquired Immune Deficiency Syndrome). The virus spreads through contact with the body fluids of an infected person. Unfortunately, no cure has been currently found, but there are drugs that can help to control the symptoms and slow down the activity of the virus.
Like any other virus, HIV has a capsid or protein coat. This protein coat protects and houses their DNA or RNA strand. Beyond the capsid is an outer membranous envelop. This envelop differs in different types of viruses, depending on the type of receptors and host cell they would have to attach to.
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Which characteristic of ions makes them important to living things?
O formation of covalent bonds
O lack of reactivity
O difficulty dissolving
O electrical charges
Answer:
electrical charges
Explanation:
I don't know but I think it is this one
Answer: electrical charges
Calculate the estimated density of the football. Use the formula
D = m/V
where D is the density, m is the mass, and V is the volume. Record your calculations in Table B of your Student Guide.
Given that the density of water is 1.0 g/cm3, make a prediction about whether the inflated football will float in water. Record your prediction in Table B.
The mass-to-volume ratio of an object determines its density.
• The tennis ball's density, D = 0.37gcm 3, makes it float in water.
• Because the golf ball has a density of D = 1.18gcm 3, it would sink.
Since the mass and volume (or radius) of the balls are not specified, the inquiry is not complete.
I'll therefore provide a broad explanation.
Tennis sphere
Assume the tennis ball has the following mass:
m = 56g
The radius is also:
T = 3.3cm
The ball's volume would be:
V = 4/3πr³
We thus have:
V = 4/3 x 22 x 3.33
V = 150.59
The ball's density is:
D = 772
We thus have:
D = 56/150.59
D = 0.37gcm 3
According to the estimates above,The tennis ball will float in water, according to the equations above, as 0.37gcm3 is less dense than 1gcm-3 of water.
Golf sphere
Assume:
m = 47g
r = 2.12cm
There is a volume:
V = 4/3πr³
We thus have:
V = 4/3 x 22 x 2.123
V = 39.93
The density is thus:
D = m/v
D = 47/39.93
D= 1.18gcm^-3
The tennis ball will sink in water with a density of -3 because 1.18gcm is more than 1gcm-3, according to the calculations above.
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These glands are also known as eccrine glands and help maintain body temperature.
Sweat glands are also known as eccrine glands and help maintain body temperature.
What are Sweat glands?
On the outside of our bodies, our sweat glands create and discharge sweat. Our entire body surface is covered in eccrine sweat glands, a type of sweat gland. Our body temperature is regulated by the clear, non-oily perspiration that is produced by these sweat glands. One of two different types of secretory skin glands that are only found in animals is the sweat gland. Body temperature is regulated by the sympathetic nervous system, which is in charge of the eccrine sweat gland. Eccrine glands produce water to the skin's surface when the internal temperature rises, where it evaporates to reduce heat. Eccrine glands are important thermoregulatory organs if they cover a large portion of the body, as they do in horses, bears, and humans.
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