Biology, 20.12.2019 23:31 bjbass899

Lymphocytes: a. possess mhc antigens for recognizing self. b. have membrane receptors that recognize foreign antigens. c. gain tolerance to self by destruction of lymphocytes that could react against self. d. develop into clones of b and t cells with extreme variations of specificity. e. all of the choices are correct.

Answers: 3

Show answers

Answers

Answer from: shels10tay

The correct answer is e. all of the choices are correct.

Explanation:

A lymphocyte is a type of white blood cell and fulfills several functions in the immune system.

a. Lymphocytes possess MHC antigens for recognizing self.

The major histocompatibility complex (MHC) is a region of very polymorphic genes whose products are expressed on the surface of almost all body cells. The molecules produced by these genes have the function of regulating the response of the immune system, especially the response mediated by T cells. The MHC of each individual influences the repertoire of epitopes that can recognize their T lymphocytes. Therefore, the capacity response to pathogens, they depend partially on that specific endowment of alleles of the MHC complex.

b. Lymphocytes have membrane receptors that recognize foreign antigens.

There are 2 types of lymphocytes, T lymphocytes and B lymphocytes, which mature from common lymphoid precursors present in the bone marrow. Each lymphocyte expresses a unique type of receptor that specifically recognizes an antigen, which is known as clonotypic receptors. T lymphocyte antigen (TCR) receptors recognize peptide antigens, presented by the major histocompatibility complex membrane molecules of antigen presenting cells1, while B lymphocyte antigen (BCR) receptors recognize soluble antigens .

c. Lymphocytes gain tolerance to self by destruction of lymphocytes that could react against self.

Tolerance is a phenomenon of great complexity and like any immune response, it is specific, transient and lies in the elimination or destruction of T and B lymphocytes, which are reactive to themselves during development.

d. Lymphocytes develop into clones of B and T cells with extreme variations of specificity.

Lymphocytes destined to be B lymphocytes enter regions not yet identified in the bone marrow, while lymphocytes destined to be T lymphocytes migrate to the thymus cortex. Once they become immune competent, they leave their respective maturation sites, enter the lymphoid system and undergo mitosis, and form a group of identical cells known as clones. All members of a particular clone can recognize and respond to the same antigen. The clone secretes clonotypic antibodies, identical to each other, and different from those of other clones.

Answer from: Quest

C. gemstones they are the only non metallic mineral from the list.

Answer from: Quest

Science27 of the most iconic, jaw-dropping photos of the earth and the moon from spacedave mosher oct 1, 2018, 11: 13 am etnasa/flickrapollo 11 astronauts took this photo of earth on july 20, 1969.from the ground, earth looks like a boundless fertile plain that beckons to be explored and exploited.but astronauts would beg - and even plead - to differ."you realize that people often say, 'i hope to go to heaven when i die,'" jim lovell, an astronaut who flew on the apollo 8 and apollo 13 missions to the moon, previously told business insider. "in reality, if you think about it, you go to heaven when you're born."lovell has seen first-hand that we live on a tiny rock hopelessly lost in the void. he's also quick to tell you it's the only one we've got - a fragile spaceship for more than 7 billion people: "you arrive on a planet that has the proper mass, has the gravity to contain water and an atmosphere, which are the very essentials for life. and you arrive on this planet that's orbiting a star just at the right distance - not too far to be too cold, or too close to be too hot - and just at the right distance to absorb that star's energy and then, with that energy, cause life to evolve here in the first place. in reality, you know, god has really given us a stage, just looking at where we were around the moon, a stage on which we perform. and how that play turns out is up to us, i guess."humanity has recorded photos of earth from hundreds, thousands, millions, and even billions of miles away, some of them taken by lovell himself.these images not only scientists study our dynamic world, but also understand how a habitable planet looks from afar, which aids the search for more worlds. most importantly, however, the images underscore our peculiar existence on a mote of cosmic dust.take a moment to ponder 27 of the most arresting images of earth that humankind has ever captured from space.a

Another question on Biology

Biology, 21.06.2019 14:00

The population of bacteria in a petri dish doubles every 40 seconds. the population of the bacteria is initially 400 organisms. what unit is most appropriate for the time at which the number of bacteria is 300? hour bacteria per hour second bacteria per second

Answers: 1

Answer

Biology, 21.06.2019 21:30

Kelly ran electricity though a sample of water using electrolysis. the water changed into two gases, x and y. it was not possible to break down the gases x and y into simpler particles.

Answers: 3

Answer

Biology, 22.06.2019 11:30

Which structure in the cardiovascular system connect arteries to veins?

Answers: 1

Answer

Biology, 22.06.2019 12:10

Recombinant dna is the merging of dna from unrelated organisms to create new genetic varieties is assembled in the lab from mononucleotides was part of the green revolution of the 1960s is pollination of one plant by another of the same species is cross-pollination of one plant by a different species

Answers: 1

Answer

You know the right answer?

Lymphocytes: a. possess mhc antigens for recognizing self. b. have membrane receptors that recognize...

Questions