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Question

Sight of delicious food usually makes mouth watery, it is a
  1. Hormonal response
  2. Neural response
  3. Optic response
  4. Olfactory response

A
Hormonal response
B
Optic response
C
Neural response
D
Olfactory response
Solution
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The sense of smell and sight of food are governed by olfactory and optic responses which work together to initiate the neural response during cephalic phase of digestion. Sight, smell and sense of food initiate the neural response in which central nervous system prepares the stomach to receive food. The responses include salivation and secretion of gastric juices. This makes options C and D incorrect and option B correct. The ingestion of food stimulates the hormonal responses to food which includes endocrine system to ensure releases of various digestive hormones at appropriate time. Correct answer is B.

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