Question

16. Identify the functions of pyloric sphincter.
i) It allows the food materials from the stomach to small intestine.
ii) It allows the food materials from the oesophagus to stomach.
m) It prevents the backward flow of food from small intestine to stomach.
iv) It allows the food materials from large intestine to small intestine.
A) i, ii and iii
B) ii, iii and iv
C) i and ili
D) ii and iv​

Answer 1

• Pyloric sphincter is a màss of circular muscular structure present at the junction of pyloric stomach and deodenum of small intestine.
• Sphincters are generally involuntary in nature.

Further, sphincters, pyloric sphincter in particular ensures easy passage of materials through various ducts and body systems. [(I) is correct]

Also, it prevents backward flow of food from small intestine to stomach. [(3) is correct]

One might argue about reverse peristalsis, reverse peristalsis is initiated in upper parts of stomach.

Option (C) is correct.

Answer 2

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Option (C) is correct.

Kⁿow More :-

The pyloric sphincter is small in size. It is present in stomach. It allow food to transfer from stomach to small intestine. It is controlled by Peristaltic waves. It helps in Digestion process. It also prevent backward flow of food from small intestine to stomach.