Question

The wave like contraction of smooth muscles of digestive tract is called

• A. Deglutition
• B. Mastication
• C. Peristalsis
• D. Fibrillation

Answer 1

The correct option is C

Peristalsis

The correct option is C.

Explanation of the correct option:

1. The food moves through the oesophagus through a special movement called peristalsis.
2. Peristalsis is the wave of constrictions caused by the circular smooth muscles of the digestive tract.
3. Peristalsis helps push the food along.
4. Peristalsis occurs through all regions of the gut.

Explanation of the incorrect option:

Option A:

The process of swallowing is called deglutition, which allows the passage of food from the mouth into the oesophagus.

Option B:

The process of crushing and grounding the food by the teeth is called chewing or mastication. It helps in increasing the surface area of the food for the action of enzymes.

Option D:

Fibrillation is a heart disease in which the heart rhythm originating from the atria is irregular and at times very rapid.

Final Answer: The wave-like contraction of smooth muscles of the digestive tract is called peristalsis.