Neurotransmitters that are modified amino acids are
A. dopamine, serotonin, epinephrine, and norepinephrine.
B. aspartic acid, glutamic acid, glycine, and GABA.
C. potassium, sodium, and calcium ions.
D. enkephalins, endorphins, and substance P.
Answer: A
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The relationship between the pressure and volume of gases is given by ________.
A) Boyle's law B) Henry's law C) Charles' law D) Dalton's law
Inhibin
a. is produced by the Leydig cells b. is produced by the developing sperm cells c. signals the interstitial cells d. does both a and c e. does none of the above
Parasympathetic stimulation reduces heart rate.
Answer the following statement true (T) or false (F)
The diffusion potential due to the concentration gradient for Na+ across a nerve cell membrane:
A. favors its movement into the cell at the resting membrane potential. B. favors its movement out of the cell at the resting membrane potential. C. is equal and opposite to the electrical potential acting on Na+ at the resting membrane potential. D. Is in the same direction as the diffusion potential due to the concentration gradient for K+. E. favors movement of Na+ in the opposite direction as the electrical potential acting on Na+ at the resting membrane potential.