Question

What is peristalsis?

• A. Wearing out of colour on the parts of leaves due to lack of carbon dioxide and chlorophyll.
• B. Process of breakdown of large food molecules into simpler molecules by the amylase enzyme.
• C. Movement of food through alimentary canal by the wavelike movement controlled by contraction and relaxation of muscles.
• D. Process by which digested food is carried by the blood to different cells in the body.

Answer 1

The correct option is C Movement of food through alimentary canal by the wavelike movement controlled by contraction and relaxation of muscles.

• Peristalsis is the slow wave-like movement seen in the walls of the oesophagus due to the contraction and relaxation of its muscles.
• Peristalsis occurs throughout the alimentary canal. This movement enables the food to be pushed downwards. Thus, Option C is correct.