Card 3 / 27: If this area was selectively destroyed on both sides, could vomiting be induced by either pharyngeal tickling or gastric distress?
A.)
Yes.
B.)
No.
Answer:
A.) Yes.
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Pharyngeal stimuli are mediated through nerves IX and X and not the area postrema. The area postrema responds to circulating substances because the blood brain barrier is absent in this area of the CNS.
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Ch 06: Head Somatic & Visceral Sensory Systems
Author:
M.D.Stephen VoronLecturer
University of Utah
USA
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