Which of these following statements best define the term "absorption"?

Food enters the mouth and is chewed

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Food enters the stomach for digestion

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Nutrition from food molecules pass to the blood

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Complex organic molecules are made in cells using digested food

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Solution

The correct option is C
Nutrition from food molecules pass to the blood

Absorption is a process in which the nutrition from food molecules pass through the wall of the small intestine and into our bloodstream. The food molecules are digested or broken down into simpler substances to ease the process of absorption.

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Q. After the partial digestion of food in mouth, it enters into ____ and reaches the stomach.

Q. When a person puts food in his mouth, then teeth cut it into small pieces, chew and grind it. The glands A in the mouth secrete a substance B which is mixed with the food by tongue. The substance B contains an enzyme C which starts the digestion of food in the mouth. The slightly digested food from the mouth goes down a tube D. The special type of movements E in the walls of tube D push the food into stomach for further digestion. The stomach wall secretes gastric juice containing three substance F, G and H. One of the functions of F is to kill bacteria which may enter the stomach with food. The substance G protects the inside layer of stomach from the damaging effect of substance F whereas substance H is an enzyme for digestion. The partially digested food then enters into small intestine for further digestion.
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