Question 3
Original source text (the original panel preserves all diagram labels, tables and choices):
The gag reflex is a reflex contraction of the
muscles of the throat, which stops material from
entering the throat (except in swallowing) and
helps to prevent choking. The sensory nerve in
this reflex is the glossopharyngeal nerve, and the
motor nerve to the throat muscles is the vagus
nerve.
Which of the following statements correctly describes the role of the
glossopharyngeal nerve and the vagus nerve in the gag reflex?
A. The glossopharyngeal nerve provides motor control to the throat muscles,
while the vagus nerve detects potentially harmful material entering the throat.
B. The vagus nerve is responsible for sensory detection of potentially harmful
material, while the glossopharyngeal nerve controls the motor contraction of
the throat muscles.
C. The glossopharyngeal nerve detects potentially harmful material and initiates
the gag reflex, while the vagus nerve controls the motor contraction of the
throat muscles to prevent choking.
D. Both the glossopharyngeal nerve and the vagus nerve are involved in sensory
detection, with the glossopharyngeal nerve specifically handling detection
and the vagus nerve managing motor responses.
The gag reflex is a reflex contraction of the
muscles of the throat, which stops material from
entering the throat (except in swallowing) and
helps to prevent choking. The sensory nerve in
this reflex is the glossopharyngeal nerve, and the
motor nerve to the throat muscles is the vagus
nerve.
Which of the following statements correctly describes the role of the
glossopharyngeal nerve and the vagus nerve in the gag reflex?
A. The glossopharyngeal nerve provides motor control to the throat muscles,
while the vagus nerve detects potentially harmful material entering the throat.
B. The vagus nerve is responsible for sensory detection of potentially harmful
material, while the glossopharyngeal nerve controls the motor contraction of
the throat muscles.
C. The glossopharyngeal nerve detects potentially harmful material and initiates
the gag reflex, while the vagus nerve controls the motor contraction of the
throat muscles to prevent choking.
D. Both the glossopharyngeal nerve and the vagus nerve are involved in sensory
detection, with the glossopharyngeal nerve specifically handling detection
and the vagus nerve managing motor responses.