How do sodium and potassium travel into and out of cells?
a. Antidiuretic hormone transports potassium and prodiuretic hormone carries sodium.
b. Specific transport proteins in the blood deliver the minerals to the cell cytoplasm.
c. The balance of insulin and glucagon determines the movement of these minerals into and out of cells.
d. Transport proteins within the cell membrane pick up and release the minerals across the membrane.
e. A negative feedback loop uses blood glucose levels for transfer.
ANS: D
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