The binding of a neurotransmitter to ligand-gated Cl- channels will cause ____ in the postsynaptic membrane
a. depolarization only
b. hyperpolarization
c. repolarization only
d. apolarization
e. depolarization and repolarization
ANSWER: b
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A researcher in a lab finds a microscopic organism that has no nucleus, but has distinctive structural molecules and
mechanisms of photosynthesis. The organisms are abundant in virtually every habitat on Earth. The researcher has identified this organism as belonging to the domain ____.
a. Bacteriab. Animalia c. Eukarya d. Protist e. Amoeba
A population grows as long as its ____
a. total fertility rate exceeds the replacement fertility rate b. replacement fertility rate exceeds the total fertility rate c. total fertility rate equals the replacement rate d. total fertility rate is at least twice the replacement fertility rate e. total fertility rate falls below the average replacement fertility rate
Why is it important that NAD+ molecules are regenerated during fermentation?
What will be an ideal response?
The bacterial A-B toxins often consist of a two-chain molecule. The 'A chain' attaches the bacterium to the cells, and the 'B chain' has biological activity against some vital function of the cells
a. true b. false