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Physiology

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GIT

Question
13 out of 19
 

Which of the following mediates cephalic phase of gastric secretion: (LQ)



A Parasympathetic nerve

B Sympathetic efferent nerve

C Chemical agents

D Neurohormones of hypothalamus

Ans. A Parasympathetic nerve

Gastric secretion occurs in three phages:

a. Cephalic phase

b. Gastric phase

c. Intestinal phase

CEPHALIC PHASEEven before the food enters the stomach, the sight and smell or even thought of food originate neurogenic signals from cerebral cortex or appetite centers These signals are transmitted through dorsal motor nuclei of vagus nerve and produce gastric secretion. Q

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