Neuropeptide neurotransmitters ____
a. can act as direct neurotransmitters between neurons and muscle cells
b. can act as postsynaptic membrane inhibitors
c. directly open K+ channels to inhibit neurons
d. can act as pain reducers and initiate euphoria
e. directly inhibit euphoria
ANSWER: d
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Indicate whether the statement is true or false.
Depending on their environments, animals may lose electrolytes (select all correct choices):
A. across the gills. B. in sweat. C. in urine. D. in feces. E. across the skin.
When a diabetic injects insulin, what does this accomplish?
A. Promotes uptake of glucose into cells, lowering blood glucose B. Improves the ability of the body to sense blood glucose levels C. Promotes hydrolysis of glycogen, raising blood glucose D. Promotes glucose release from cells, raising blood glucose
The region of a chromosome holding the two double strands of replicated DNA together is called ________.
Fill in the blank(s) with the appropriate word(s).