Sudden, painful involuntary contractions of either smooth or skeletal muscle are called
A. spasms.
B. convulsions.
C. cramps.
D. sprains.
Answer: A
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The purpose of acetylcholinesterase is to
a. break down acetylcholine at synapses to limit its availability for activating its receptor. b. transfer the acetyl group of acetyl CoA to oxaloacetate in the tricarboxylic acid cycle. c. import acetylcholine into synaptic vesicles in the nerve endings. d. transfer the acetyl group of acetyl CoA to choline to generate acetylcholine.
The functional units of the kidneys are:
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The spheroidal stage of early prenatal development with about 16 to 64 cells is called a(n) ________
A) zygote B) morula C) blastomere D) embryo E) blastocyst