An action potential occurs in the postsynaptic muscle cell when ____________________

a. acetylcholine binds to the receptors on the muscle cell
b. when calcium functions as a neurotransmitter
c. the sodium–potassium pump moves ions across the membrane
d. all of these


A

Biology & Microbiology

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Molecules are considered stereoisomers when:

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Which of the following are considered more

primitive based upon the structure of their limbs? a. bats b. reptiles c. porpoises d. penguins e. birds

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The arrival of an action potential at a synaptic terminal causes voltage-gated potassium channels to

open. ____________________ Indicate whether the statement is true or false.

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The large seaweed known as kelp is classified as a member of the

A) Chlorophyta. B) Phaeophyta. C) Chrysophyta. D) Rhodophyta. E) Deuteromycete.

Biology & Microbiology