Which is the proper order of events in cell-mediated immunity?
(1) cloning of cytotoxic T cells and memory T cells
(2) antigen presented to T lymphocyte
(3) activation of T lymphocytes
(4) cytotoxic T cells attack target cells
A. 2, 3, 4, 1
B. 1, 4, 2, 3
C. 2, 3, 1, 4
D. 3, 2, 4, 1
E. 1, 2, 3, 4,
C
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By what means does the endocrine system regulate bodily processes?
a. nerves b. electrolytes c. minerals such as calcium d. carbon dioxide e. hormones
Gap junctions allow direct communication or ionic flow between adjacent cells for a(n) ______ synapse, while synapses that use neurotransmitters to signal from the presynaptic to postsynaptic cell are called _______ synapses.
a. direct, electrical b. chemical, indirect c. electrical, chemical d. chemical, electrical
Which hormone controls water balance in the bloodstream?
a. vasopressin b. renin c. angiotensin d. aldosterone e. dopamine
Of the descriptions given, which is consistent with an abnormal blood smear?
A) Eosinophils outnumbered lymphocytes. B) Neutrophils and lymphocytes were commonly found. C) More red than white blood cells were observed. D) Monocytes were observed but not common.