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Marina CMI [18]
3 years ago
15

I need help with both please

Biology
1 answer:
Firdavs [7]3 years ago
4 0
Your answer is correct

A. the answer is spindle fibers attach to each sister chromatid
B. chromosomes condense and spindles form
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For which patient will the nurse need to consult the beers criteria prior to administering medications?
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<span>The nurse would need to consult the beers criteria prior to giving medications to patients who fall in the category of elderly. This list would notify the nurse what medications are considered inappropriate. Incidentally, the list of patients not covered by this list include newborns, toddlers, and teenagers.</span>
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Hiv can be transmitted from mother to fetus, and approximately 1/3 of infected infants will die within a few years of birth. the
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Meiosis consists of cell divisions with only one duplication of . this division results in daughter cells, each with set of chro
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SOS:

The answer is

  • <u><em>Two</em></u>
  • <u><em>Chromosomes</em></u>
  • <u><em>Four</em></u>
  • <u><em>One </em></u>
  • <u><em>Haploid</em></u>

<em>Hope this helps!</em>

6 0
3 years ago
What is the basic difference in effector function between helper and cytotoxic T cells?
3241004551 [841]

Answer:

Helper T cells stimulate B-cells to produce antibodies and killer T cells to destroy the non-self cells. Cytotoxic T cells on the other hand are direct attack cells. They can kill the micro organisms by creating pores on the invader's cell.

Explanation:

T lymphocyte mediated immunity of cell mediated immunity do not secrete antibodies but they help stimulate the B cells to produce them. Immature T cells are produced in bone marrow from where they migrate to thymus via blood. In the thymus maturation of T cells occur and then they migrate to lymphoid tissue and get differentiated into three types:

a. Helper T cells: As the name suggests, they help in activating other immune cells, in other terms they are the regulator of virtually all functions of immune system. Protein mediator called lymphokines are produced by these helper T cells in order to regulate the immune functions. Some examples of these lymphokines are: Interleukin-2 interleukin-3, interferon gamma. T helper cells stimulate the B-cells to produce antibodies.

b. Cytotoxic cells or killer T cells: The lymphokine interleukin-2 is responsible for the growth and proliferation of both cytotoxic T cells and suppressor T cells. With the help of receptor proteins on the surface of killer T cells, they bind to the specific antigen. After binding, they secrete a pore forming protein called perforins which create pores on the invaders cell membrane for water to enter into it thereby cell swells and finally lyse.

c. Suppressor T cells: They suppress the function of above two T cells.

5 0
3 years ago
How does the tar from cigarette smoking disrupt oxygen distribution to the cells?
elena-14-01-66 [18.8K]
By tar, I think you mean nicotine. (I Hope). It affects the nerve signals that regulate breathing.
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