Epinephrine inhibits salivary gland activity and muscle cell contraction in the
ID: 163056 • Letter: E
Question
Epinephrine inhibits salivary gland activity and muscle cell contraction in the airways, yet stimulates glycogen release in muscle cells and heart muscle cell contraction. How could one hormone have opposing effects on different organs?
Multiple Choice
Cells in the different tissues would have epinephrine receptors coupled to different signaling pathways.
Cells in the tissues that are suppressed do not express an epinephrine receptor.
Cells in tissues that are not responsive contain enzymes that break down epinephrine when it enters the cell.
Only responsive tissues are exposed to the epinephrine in the blood stream.
Cells in responsive tissues have signal transduction pathways.
Explanation / Answer
Ans:
Epinephrine inhibits salivary gland activity and muscle cell contraction in the airways,yet stimulates glycogen release in muscle cells and heart muscle cell contraction.Epinephrine have opposing effects on different organs.
Explanation:
Cells in different tissues would have epinephrine receptors coupled to different siganaling pathways.
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