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Fundamental Organisation Human Physiology Nutrition And Digestion - Questions and Answers

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126. Which portion of the digestive system in man is guarded by cardiac sphincter
A. Epiglottis
B. Oesophagus
C. Stomach
D. Duodenum
Explanation:
127. Which one of the chemical substance in the human saliva acts as buffers
A. Sodium
B. Sodium chloride
C. Potassium
D. Bicarbonates
Explanation:
128. Proteins are converted into peptones by the action of
A. Pepsin
B. Renin
C. Lipase
D. Trypsin
Explanation:
129. In the digestive system of man, pyloric sphincter guards the opening between
A. Duodenum and large intestine
B. Stomach and duodenum
C. Small intestine and large intestine
D. Large intestine and rectum
Explanation:
130. Which one of the following is correct during the swallowing of food in man
A. Nasal cavity and trachea remain opened
B. Nasal cavity and trachea remain closed
C. Nasal cavity remains closed and trachea is kept opened
D. Nasal cavity is opened and trachea is closed
Explanation:
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