The complement system works closely with and complements the action of
A) interferons.
B) antibodies.
C) pyrogens.
D) phagocytes.
E) microphages.
B
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Which reflex specifically adjusts cardiac output and peripheral resistance to maintain arterial pressures?
Cancer that originates in the lungs is most likely to begin in
A) epithelial cells. B) hyaline cartilage cells. C) smooth muscle cells. D) dense connective tissue cells.
Which of the following would NOT cause the membrane potential to change from -70 mV to +30 mV?
A. Sodium ions entering the cell. B. Potassium ions leaving the cell. C. Calcium ions entering the cell. D. Chloride ions leaving the cell.
How do parasympathetic neurons in the medulla respond to increased blood pressure?
A) Heart rate is increased. B) Vasoconstriction is promoted. C) Sympathetic activity is inhibited. D) Cardiac output is increased.