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Multiple Choice
Which of the following is an exclusively sympathetic function?
A
Digestion
B
Pupil constriction
C
Salivation
D
Increased heart rate
Verified step by step guidance
1
Understand the autonomic nervous system, which is divided into the sympathetic and parasympathetic systems. The sympathetic system is often described as the 'fight or flight' system, while the parasympathetic system is known as the 'rest and digest' system.
Identify the functions typically associated with the sympathetic nervous system. These include increasing heart rate, dilating pupils, inhibiting digestion, and increasing blood flow to muscles.
Consider the functions listed in the problem: Digestion, Pupil constriction, Salivation, and Increased heart rate.
Recognize that digestion, pupil constriction, and salivation are primarily controlled by the parasympathetic nervous system, which promotes rest and energy conservation.
Conclude that increased heart rate is an exclusively sympathetic function, as it prepares the body for action by increasing blood flow and oxygen delivery to muscles.