A patient is prescribed an MAO inhibitor by their doctor. Knowing the actions of MAO inhibitors, this patient's diagnosis may be ________.
A. depression, since MAO inhibitors block the binding of serotonin to postsynaptic cells
B. depression, since MAO inhibitors block the degradation of serotonin at the synapse
C. hypertension, since MAO inhibitors block the release of norepinephrine from sympathetic axons
D. hypertension, since MAO inhibitors block the degradation of norepinephrine at the synapse
Answer: B
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Myasthenia gravis is a collection of muscle disorders that cause muscle fatigue and weakness. What is the major mechanism?
A. Autoimmune destruction of L-type Ca2+ channels. B. Overproduction of acetylcholinesterase C. Autoimmune destruction of nicotinic acetylcholine receptors D. Demyelination of axons in motor pathways E. A tumor that overproduces acetylcholine
Which of the following regions of the radius help form the wrist joint?
A. Radial tuberosity B. Neck C. Styloid process D. Head
The three major subdivisions of extracellular fluid found in the body are
A) blood, plasma, and lymph. B) blood, interstitial fluid, and cytosol. C) blood, lymph, and cytosol. D) plasma, lymph, and interstitial fluid. E) plasma, interstitial fluid, and cytosol.
What term means that both alleles are the same?
A. locus B. alleles C. homozygous D. heterozygous E. karyotype