Do all types of helper t-cells bind to all antigens

Answers

Answer 1

No not all types of helper T-cells  bind to all antigens, between an antigen and B-cell different from the binding between an antigen and helper T-cell, B-cells directly bind to free-floating pathogens, and helper T-cells bind to APCs. The helper T-cell's antibody accepts an antigen from the surface of a B-cell.

Answer 2

Answer: No

Explanation:

T helper cells are the CD4+ T cells which play an important role in the adaptive immune system.The T helper cells are majorly of two types Th1 and Th2. Besides this another category is of Th17 cells.The T helper cells are able to bind the antigens only when they are presented in a complex bound by MHC. The cells which express MHC bound antigens on their surface are referred to as Antigen presenting cells.All types of helper T cells are not able to bind to all antigens because each type of T cell formed in the body is specific for a particular antigen. This specificity for a particular antigen is acquired when the T cell maturation takes place.Further, the T helper cells are not able to bind to soluble antigens that are not bound to MHC. In fact the soluble antigens are bound by the antibodies released by the B cells.

Thus, it would be incorrect to say that all types of helper T cells bind to all antigens.


Related Questions

If the ecosystem is balanced, which populations should be the largest? Which should be the smallest?

Answers

If the ecosystem is balanced then the population would aslo be balanced, IG its the unbalanced ecosystem which leads to unbalanced population and when its unbalanced then we can say which one would be largest and which one smallest..

Which of these statements are likely to be found in a psa? select the two correct answers?

Answers

Below are the statements:

Lung cancer is frequently caused by tobacco utilize. 
Hitting the bottle hard can prompt liquor harming and passing. 

Until around 2008, a few specialists and expert associations supported yearly PSA screening for men starting at age 50. A few associations suggested that men who are at higher danger of prostate tumor, including African American men and men whose father or sibling had prostate growth, start screening at age 40 or 45.

Answer:

Lung cancer

Explanation:

At which stage of mitosis are chromosomes usually photographed in the preparation of a karyotype?
a.prophase
b.metaphase
c.anaphase
d.telophase
e.interphase

Answers

hi cupcake :wink: i'm jk

the answer is b.) metaphase 

Passive communicators do all of the following EXCEPT:

Answers

Hey You! The Answer To Your Question Is:

Except stand up for themselves when needed.

I recommend you add the options next time, as most people who haven't already taken the quiz won't know what your question is asking.

I Really Hope This Helped You, Good Luck With Your Studies! =)

Answer:

C.

stand up for themselves when needed

Photosynthesis and why it is the most important chemical reaction on earth

Answers

The most common and critical type of photosynthesis takes place in chlorophyll‐containing plants, algae, and cyanobacteria.

Atom A has an atomic number of 19 and mass number of 40. Atom B has an atomic number of 20 and a mass number of 40. Which of these is an accurate statement?

A) Atom A has more protons than Atom B.
B) Atom A has one less proton and one more neutron than Atom B.
C) Atom A has an extra nucleon compared to Atom B.
D) Atom A has one more proton and one more electron than Atom B.

Answers

First, the atomic number is equal to the number of protons. Also, the mass number is protons plus neutrons, as electrons weigh so little that they are not included. So Atom A has 19 protrons and 21 neutrons, while Atom B has 20 protons and 20 neutrons. Answer A and B are not true because Atom A has 1 less proton than Atom B. Answer C is not correct because nucleons are either protons or neutrons, which both atoms have an equal number of, as they have a mass of 40. Therefore, the answer must be B.

Answer:

B) Atom A has one less proton and one more neutron than Atom B.

Explanation:

Atom A has the same mass but one less proton. So, Atom A has one less proton and one more neutron than Atom B.

energy derived from burning wood, alcohol, and garbage
Nonrenewable resources

Renewable resources



Turbines

Geothermal

Cells

Biomass

Answers

The answer is Biomass

Answer: Biomass

Explanation: The energy derived by burning of the wood, alcohol and garbage can be defined as biomass.

This is the dry form of the substances that is burned to get energy. This energy can be used for many processes in industries.

Biomass acts a fuel and its burning leads to the emission of carbon dioxide, and other gases in the environment.

Thick mucous gland secretions, elevated sweat electrolytes, meconium ileus, and difficulty maintaining and gaining weight are associated with which autosomal recessive disorder?

Answers

The symptoms given above are associated with CYSTIC FIBROSIS.
Cystic fibrosis is a genetic disorder that usually affect the lungs, but it can also affect the liver, pancreas, intestines and the kidney. Symptoms include difficulty in breathing, coughing up of mucus, etc. The disease causes persistent lung infections and limit the ability to breath over time.

The depolarization causes a ____________ that excites the entire membrane.

Answers

I'm not sure if this question is talking about neurons, but if it is... depolarization in a neuron leads to an "action potential." 

Societal regulations and laws may be developed or changed in response to scientific findings. Which type of scientific research has resulted in the passing of many laws?

Answers

Modeling and predicting what is bound to happen in the future using deduction of impossible possibilities

Primary treatment for myocardial infarction (mi) due to acute ischemia is directed at ______

Answers

Decreasing myocardial oxygen demands. 

Twelve-year-old sam has begun to develop facial hair and acne. his twin sister stacey is developing underarm hair and acne. what hormone is responsible for these changes?

Answers

The changes observed in Sam and his twin sister is known as puberty changes. The hormone that is responsible for puberty changes is LUTENIZING HORMONE.
The pituitary gland is the one responsible for releasing lutenizing hormone. In females, lutenizing hormone stimulates the oestrogen hormone to be released in female and testosterone hormone to be released in males.

What do the respiratory system and cellular respiration have in common?

Answers

Oxygen plays an important/ key role in both systems. 

The respiratory system and cellular respiration have oxygen in common because: Oxygen plays vital roles in both systems.

Oxygen plays an important role in both systems

Respiratory system comprises of organs such as the lungs, blood vessels, airways which enable you to breathe in oxygen and also give out carbon dioxide.

Oxygen is key to the respiratory system as all organs and vessels associated with is works in getting oxygen to the cells of the body, and also giving off carbon dioxide.

In same vein, cellular respiration makes use of oxygen during the breakdown of glucose to release energy as well as carbon dioxide and water.

See attachment for the diagram showing a a simple equation of cellular respiration involving oxygen.

In conclusion, the respiratory system and cellular respiration have oxygen in common because: Oxygen plays vital roles in both systems.

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Indicate which strategy is likely to lead to optimal muscle glycogen replenishment. meal size

Answers

Final answer:

Optimal muscle glycogen replenishment is likely to occur through balanced intake of nutrients, particularly carbohydrates. The hormone insulin assists in glucose absorption by cells and promotes the synthesis of glycogen in liver and muscle cells. Excess nutrients can contribute to glycogen storage, which is crucial in the post-absorptive state where the body relies on these stores for energy.

Explanation:

For optimal muscle glycogen replenishment, a strategy involving balanced nutrient intake with an emphasis on carbohydrates is most effective. Upon ingestion, carbohydrates, primarily glucose, are used to replenish glycogen stores within muscles and liver. As the body transitions into a post-absorptive state, the body utilizes stored glycogen for energy needs - this state can last up to 4 hours post meal. In this case, meal size can be a factor in glycogen replenishment: balanced meals with adequate carbohydrates can ensure optimal glycogen stores.

Excess nutrients (proteins, fats, glucose) can contribute to glycogen storage that can be used at a later point when food is scarce or energy demands are high. Extra glucose and ATP, for instance, can produce glycogen. When consumption outpaces need, excess glucose can be stored as glycogen in the liver and muscle cells, or as fat in adipose tissue.

In essence, insulin plays a vital role in glycogen storage. Following a meal, insulin facilitates the absorption of glucose by cells and promotes glycogen synthesis in the liver and muscle cells. In ensuring adequate glycogen stores, incorporating balanced meals with an appropriate size and timing is key.

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Analyze how sustainable use could preserve biodiversity in hot spots

Answers

sustainable use would promote the least ecologically damaging manner of extracting resources from delicate ecosystems. Preserving the plants and animals near these sites is instrumental in preserving bio-diversity by not disturbing it in the first place.

The plasma membrane is composed of a _____ and which two layers of molecules arranged tail to tail

Answers

Phospholipids

The plasma membrane is composed of phospholipids in which two layers of molecules . . .
Phosphilipids are in the plasma mebrane.

Volume can be measured in:
A.centimeters
B.square centimeters
C.cubic centimeters

Answers

Cubic centimeters is the answer
Cubic centimeters! So C, Hope this helped!

The PMI of a deeply buried body should show evidence of major _____ decomposition.

A.) microbial
B.) insect
C.) scavenger
D.) mite

Answers

The evidence of a major microbial decomposition

Answer:

A.) microbial

Explanation:

PMI is an acronym for the term "Post-mortem internal" that determines the time that has passed since an individual died. This term is highly useful in various sciences, such as forensic science, around the world. The PMI is very important to know the degree of decomposition of a body that I am going to bury. The PMI of a deeply buried body is known to show evidence of increased microbial decomposition.

Michelle had a lobotomy (a surgical technique) in which her entire frontal lobe was removed. michelle will likely have difficulties in:

Answers

Michelle will likely have problems in planning and judgment. The lobotomy also named prefrontal leukotomy, surgical process in which the nerve passageways in a lobe or lobes of the brain are separated from those in other areas. The process before was used as a radical beneficial measure to help totally troubled patients with schizophrenia, manic depression and mania and other mental diseases.

The jovian planets have high masses and hence generate powerful gravitational fields, and yet they have low average densities. what does this fact indicate about their interiors?

Answers

The fact that the jovians planets have high masses and hence generate powerful gravitational fields, but they have a low average densities indicates about their interiors composed mainly of very light elements, such as H and He. The jovians planets compose of only very light elements like He and H.

1. A long-term relationship in which both species benefit is known as parasitism. *

A. True
B. False

2. The relationship of algae living in the fur of a 3-toed sloth and helping to camouflage the sloth, is called *

A. symbiosis
B. mutualism
C. commensalism
D. parasitism

3. A deer tick feeding on a human is an example of *

A. biodiversity
B. parasitism
C. commensalism
D. mutualism

4. Which of the following is an example of consumers outnumbering the producers they are feeding upon? *

A. a tree with thousands of insects feeding on it
B. several
C. mutualism
D. predation

5. A fish cleaning the mouth of a larger fish and being protected by the larger fish is an example of *

A. parasitism
B. mutualism
C. commensalism

Answers

1) is true 
2) is B
3) is C
4) is D
5) is A

A mother of a 4-year-old child asks the nurse how to talk with her daughter about strangers. the little girl is very friendly and her mother is concerned that her child could be abducted. the nurse should tell the mother:

Answers

The nurse should tell the mother to advice her child that it is not bad of engaging or socializing to other people but it is also best to be cautious and to watch out with people that she doesn't know, which are strangers. The nurse should tell to the mother that she should tell her child the possibilities that may happen if her child is not careful around with people that she doesn't know of and that there are things that she should be cautious about, a helpful tactic that could support the teaching is by providing examples or stories to the child.

Part b - phases of the cell cycle the cell cycle represents the coordinated sequence of events in the life of a cell from its formation to its division into two daughter cells. most of the key events of the cell cycle are restricted to a specific time within the cycle. in this exercise, you will identify when various events occur during the cell cycle. recall that interphase consists of the g1, s, and g2 subphases, and that the m phase consists of mitosis and cytokinesis. drag each label to the appropriate target. hints at this point, cell commits to go through the cycle. mitotic spindle begins to form. cell divides, forming two daughter cells. dna replicates. non-dividing cells exit cell cycle. centrosome replicates.

Answers

I found the exercise online and this is the answer:
A. Non dividing cells exit cell cycle
B. At this point, cell commits to go through the cycle.- If the cell passed the checkpoint, it can now enter the cycle, starting on the first stage: G1
C. DNA replicates - The cell starts replicating the DNA in the S phase to then later, separate it in two cells.
D. Centrosome replicates
E. Mitotic spindle begins to form. in the M phase, after passing the G2 checkpoint
F. Cell divides, forming two daughter cells.- After passing the last checkpoint, the call can finally start mitosis process.

The sodium-potassium pump plays an important role in the water balance of cells.in terms of osmosis, explain the consequences of the sodium-potassium pumps not working;

Answers

Osmosis is the process by which water molecules move through a semi permeable membrane from the region of lower solute concentration to the region of higher solute concentration. The sodium potassium pump plays a key role in the process of osmosis in the cells. If the sodium potassium pump is not working, excess potassium or sodium will accumulate either outside or inside of the cells and this will cause osmotic imbalance in the body, with the cells either shrinking or bursting.

describe one cellular activity that uses the energy released by ATP

Answers

A cellular activity that uses energy that is released by ATP would be any kind of movement

One of the basic examples of cellular activity, which uses energy released by ATP is the movement of muscles.  

• The muscle cells utilize both fatty acids and glucose for their aerobic respiration, and these cells are the prime users of ATP generated by aerobic respiration.  

• The muscle cells use ATP mainly for two things, that is, for active transport of calcium ions and the movement of motor proteins.  

• The muscle cells use ATP for the active transport of calcium ions into the sarcoplasmic reticulum at the time of muscle contractions.  

• For the second time, ATP is used by muscle cells to detach the head of the myosin from the actin filaments at the time of the relaxation of muscles.  

Thus, muscular movement is one of the cellular activity, which use the energy of ATP.

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Subliminal stimulation occurs below the _____ threshold for conscious awareness.

Answers

I belive the answer is absolute.
hope this helps!

Which of the following are true of sedimentary rocks? Check all that apply! They come from magma. They are formed from the natural processes like wind and water called 'weathering'. Tiny pieces of rocks are called sediments. Sediments pile up and are cemented or compacted together.

Answers

The answer is Tiny pieces of rocks are called sediments. and Sediments pile up and are cemented or compacted together. can you give brainliest if its right?


The best definition of a purebred plant is one that

Answers

is homozygous I think because it has 1 allele 
Hey there,
The answer to your question is : It self fertilizes to produce offspring identical to the parent

Hope this helps :))

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Whenever possible, the nurse who is treating the pain of older adults should avoid the use of which drug(s)?

Answers

The answer is NSAIDS, because this has a risk of renal and gastric complications and should be used with caution.
Hello there,
Nonsteroidal anti-inflammatory drugs (NSAIDs) risk of renal and gastric complications in older adults and should be used with particular caution.

Hope this helps :))

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Barnacles and mussels are filter feeders that attach themselves to rocks in the intertidal zone. A scientist observed a dense colony of barnacles covering a rock surface. The mussels were limited to the crevices in the same rock. Evaluate the observation given the limiting factors in the zone.

Answers

Final answer:

Barnacles cover rock surfaces while mussels are in crevices due to intertidal limiting factors such as competition, predation, and environmental conditions. Nutrient availability, like plankton, is critical for sustaining their populations in the intertidal zone.

Explanation:

The observation of barnacles dominating the rock surfaces and mussels being restricted to crevices can be understood by evaluating the limiting factors present in the intertidal zone. Barnacles secrete a cement-like substance allowing them to firmly attach to open, exposed surfaces, which helps them to filter feed efficiently in this constantly changing environment. In contrast, mussels are often found in the somewhat more protected crevices, possibly due to a combination of biological and environmental factors such as competition for space, predation, and physical conditions (e.g. wave exposure, desiccation). Given that both mussels and barnacles are filter feeders, the availability of nutrients, primarily plankton, plays a critical role in establishing the maximum sustainable population.

Therefore, factors such as the distribution of phytoplankton and the rate of water flow, which influence the delivery of nutrients, are crucial for maintaining dense populations in the intertidal zone.

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