Textbook Question
Which cranial nerves would be affected by a drug that stimulates the parasympathetic nervous system? Predict potential adverse effects that one might experience.
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14. The Autonomic Nervous System
Parasympathetic Nervous System
Multiple Choice
Which of the following is not a result of parasympathetic stimulation?
A
Increased salivation
B
Decreased heart rate
C
Pupil dilation
D
Increased digestive activity
Verified step by step guidance1
Understand the role of the parasympathetic nervous system: It is part of the autonomic nervous system responsible for 'rest and digest' activities, promoting relaxation and conserving energy.
Identify the typical effects of parasympathetic stimulation: These include increased salivation, decreased heart rate, and increased digestive activity, all of which align with the 'rest and digest' function.
Consider the function of pupil dilation: Pupil dilation is typically associated with sympathetic stimulation, which prepares the body for 'fight or flight' responses, not relaxation.
Compare the options given: Increased salivation, decreased heart rate, and increased digestive activity are consistent with parasympathetic effects, while pupil dilation is not.
Conclude that pupil dilation is the correct answer as it is not a result of parasympathetic stimulation, but rather sympathetic stimulation.
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