Interleukins do all of the following except
A) increase T-cell sensitivity to antigens exposed on macrophage membranes.
B) stimulate B-cell activity, plasma cell formation, and antibody production.
C) stimulate inflammation.
D) elevate body temperature.
E) stimulate collagen synthesis.
E
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2,3-diphosphoglycerate
a. is produced within red blood cells b. production is inhibited by HbO2 c. concentration gradually increases when Hb in the arterial blood is chronically undersaturated d. can bind with Hb e. has all of the above characteristics
Stimulation of the beta receptors on heart muscle cells does not result in
A) the formation of cAMP. B) increased heart rate. C) increased force of contraction. D) increased metabolism. E) inactivation of G proteins.
Which of the following is not true of the effects of various factors on blood pressure?
A. An increase in vasoconstriction of blood vessels increases blood pressure. B. An increase in blood volume increases blood pressure. C. An increase in cardiac output increases blood pressure. D. An increase in peripheral resistance decreases blood pressure. E. All of these are true of the effects of various factors on the blood pressure.
Which of the following is NOT a neurotransmitter that has been primarily associated with emotional and behavioral pathways?
a. norepinephrine b. dopamine c. acetylcholine d. serotonin e. none of these.