Question

Briefly Correct the following FALSE statements:(6 points each) 1) The Thymus Gland is the principal birthplace of all lymphocytes. 2) Interferons are named that because they "interfere" with the mechanisms of inflammation. 3) T-lymphocytes are involved only in cell-mediated immunity. 4) Anyone who is HIV-positive is considered to have AIDS. 5) B-cells that circulate freely in the blood stream are called plasma cells.. 10) The greatest effect of accelerated breathing is to increase the oxygen content of the blood.

Answer 1

Answers:

1. Bone marrow is the principle birthplace of both B and T lymphocytes. Although, T cells migrate to and mature in the thymus gland.

2. Interferons are released by immune cells in response to viral infection. They are named that because they ''interfere'' with with viral replication.

3. Along with cell mediated immunity mediated by cytotoxix T cells. T helper cells initiates humoral immune response by activating B cells to produce various antibodies.

4. AIDS (acquired immunodeficiency syndrome) develops when a HIV-positive person have severe damage to the immune system.

5. Memory B cells circulate freely in the blood stream to identify and neutralize the antigens. While, plasma cells secrete antibodies.

10. The greatest effect of accelerated breathing is to reduce the level of carbon dioxide in your blood.

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