During a Fight-Or-Flight Response, a Person Can Experience Vasoconstriction in Some

question 7

Multiple Choice

During a fight-or-flight response, a person can experience vasoconstriction in some blood vessels and vasodilation in others. How is it possible that norepinephrine can produce both vasodilation and vasoconstriction?

• A) There are different membrane receptors for noepinephrine, and activation of different receptor types determines the response of the effector
• B) There are different forms of norepinephrine which bind to the same receptors but have different effects on the cells
• C) When norepinephrine flows through the membrane into smooth muscle cells, it can bind to different proteins causing different responses in different cells.
• D) Norepinephrine can bind to G-protein receptors causing a signal cascade and cAMP can have various effects inside of the cytosol, depending on the type of cell that it is in.

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