HIV infection and the subsequent destruction of which cell type is most devastating to overall immune system function?

A. cytotoxic T cells
B. memory B cells
C. helper T cells
D. monocytes
E. natural killer cells


C. helper T cells

Biology & Microbiology

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Oxygen diffuses equally well through waterlogged soil and dry soil.

Answer the following statement true (T) or false (F)

Biology & Microbiology

The central nervous system of vertebrate animals consists of

A. the brain. B. the spinal cord. C. all nerves in the body. D. nerves originating at sensory receptors. E. the brain and spinal cord.

Biology & Microbiology

Which white blood cells comprise 3-7% of circulating WBCs, are phagocytic, and can migrate out into body tissues to differentiate into macrophages?

A. Monocytes B. Eosinophils C. Lymphocytes D. Neutrophils E. Basophils

Biology & Microbiology

Which organisms obtain heat primarily from internal physiological sources?

a. allotherms b. ectotherms c. exotherms d. endotherms

Biology & Microbiology