Multiple Choice
Which part of the autonomic nervous system directly controls the digestive system?
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14. The Autonomic Nervous System
Introduction to the Autonomic Nervous System
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Which of the following lowers blood pressure by reducing the sympathetic vasomotor response?
A
Increased norepinephrine release
B
Parasympathetic nervous system activation
C
Sympathetic nervous system activation
D
Adrenal medulla stimulation
Verified step by step guidance1
Understand the role of the sympathetic and parasympathetic nervous systems: The sympathetic nervous system typically increases heart rate and blood pressure, while the parasympathetic nervous system generally works to decrease them.
Identify the effects of norepinephrine: Norepinephrine is a neurotransmitter associated with the sympathetic nervous system, which usually increases blood pressure by causing vasoconstriction.
Consider the role of the adrenal medulla: The adrenal medulla releases adrenaline and norepinephrine, which are part of the sympathetic response, thus increasing blood pressure.
Recognize the function of parasympathetic nervous system activation: Activation of the parasympathetic nervous system leads to a decrease in heart rate and promotes vasodilation, which lowers blood pressure.
Conclude that parasympathetic nervous system activation is the mechanism that lowers blood pressure by reducing the sympathetic vasomotor response.
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