Which of the following occurs first in the generation of an action potential?

A) Voltage-gated potassium channels open.
B) The membrane repolarizes.
C) The membrane depolarizes.
D) Voltage-gated sodium channels open


Answer: C) The membrane depolarizes.

Anatomy & Physiology

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Poison ivy contains a toxin that acts as a hapten by

A. raising the body's sensitivity to a wide variety of chemicals such as penicillin. B. preventing effective immune responses by blocking release of bradykinin. C. combining with a body protein and then triggering an immune response. D. cutting plasma protein antibodies in half.

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Antigen displaying cells are infected by pathogens so they can display the antigens

Indicate whether the statement is true or false.

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What is the process whereby molecules are selectively transported from the peritubular fluid to the

A) glomerular filtration B) secretion C) reabsorption D) absorption E) excretion

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