Which molecule is stored at adrenergic storage sites?

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Study for the Pharmaceutics Xenobiotics Across Bio Membrane Test. Prepare with flashcards and multiple-choice questions, each providing hints and explanations. Get ready for your pharmacy exam!

Multiple Choice

Which molecule is stored at adrenergic storage sites?

Explanation:
Catecholamines are stored at adrenergic storage sites. These include norepinephrine and epinephrine, which are packaged into vesicles in adrenergic neurons (and chromaffin cells of the adrenal medulla) so they can be released quickly in response to nerve signals. Storing them in vesicles protects them from degradation and allows rapid, regulated exocytotic release when Ca2+ triggers fusion of the vesicles with the membrane. The other options aren’t stored as adrenergic signaling molecules—iodine is an element used in hormones, potassium is an ion involved in electrical activity, and water is the body’s solvent.

Catecholamines are stored at adrenergic storage sites. These include norepinephrine and epinephrine, which are packaged into vesicles in adrenergic neurons (and chromaffin cells of the adrenal medulla) so they can be released quickly in response to nerve signals. Storing them in vesicles protects them from degradation and allows rapid, regulated exocytotic release when Ca2+ triggers fusion of the vesicles with the membrane. The other options aren’t stored as adrenergic signaling molecules—iodine is an element used in hormones, potassium is an ion involved in electrical activity, and water is the body’s solvent.

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