Match the words in column A with those in column B. Column A Column B a. Cow p. Long, sticky tongue b. Mosquito q. Long trunk c. Frog r. Chews the cud d. Elephant s. Sharp mouthparts

a-r The cow has flat front teeth that help them to bite and cut their food. Sometimes the cows swallow their food without chewing it. Later, they bring back their food and chew it well. This is called chewing the cud. b-s The mosquito has tube-like mouthparts to attack the skin and suck blood. c-p Frogs have a long, sticky tongue that they bring out to catch insects. d-q The elephant has a long trunk, with which it breaks off branches from trees and puts them into its mouth. Elephant also has long tusks coming out from the mouth. Column A Column B a. Cow r. Chews the cud b. Mosquito s. Sharp mouthparts c. Frog p. Long, sticky tongue d. Elephant q. Long trunk

Match the following: Column A Column B 1. Carbohydrates (i) Fatty acids and glycerol 2. Proteins (ii) Sugar 3. Fats (iii) Amino acids

1- (ii) The carbohydrates get broken into simple sugars such as glucose. The carbohydrates cannot be utilized as such, therefore they are broken down into simpler substances. 2- (iii) The proteins are broken down into simpler substances i.e. amino acids by the action of enzymes in the digestive juices. 3- (i) The partly digested food reaches the small intestine where the intestinal juice completes the digestion of all components of the food. The fats are broken down into fatty acids and glycerol. Column A Column B 1. Carbohydrates (ii) Sugar 2. Proteins (iii) Amino acids 3. Fats (i) Fatty acids and glycerol

Match the items of column I with those given in column II. Column I Column II Food components Products of digestion (i) Carbohydrates (a) Fatty acids and glycerol (ii) Proteins (b) Sugar (Glucose) (iii) Fats (c) Amino acids

(i) - (b) Carbohydrates are sugars that are present in our food. The digestion of carbohydrates starts in the mouth. Polysaccharides such as starch are converted into maltose in the mouth which is further converted into glucose in the small intestine. (ii) - (c) Proteins are bodybuilding nutrients. These are macromolecules that are made up of many monomers called amino acids. There are a total of 20 amino acids. Digestion of proteins starts in the stomach where proteins are converted into peptones and proteoses which are further broken down to amino acids in the small intestine. (iii) - (a) Fats are macro nutrients that store energy. They break down into fatty acids and glycerol. They can be broken down by the bile juice secreted by the liver and the enzyme, lipase secreted by the stomach, mouth, and pancreas. Column I Column II Food components Products of digestion (i) Carbohydrates (b) Sugar (Glucose) (ii) Proteins (c) Amino acids (iii) Fats (a) Fatty acids and glycerol

The ingestion of food is the process of intake of food by an organism and human beings ingest food through their mouth. The ingested food is processed by breaking the food into small pieces by the teeth which is then lubricated by the saliva so that it can be swallowed with the help of the tongue.

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Lacteals absorb and transport large molecules, fats, and lipids in the digestive system mainly in the form of lipoproteins.

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Important Questions on Ingestion, Digestion, Absorption and Assimilation in Humans

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Science>Biology>Ingestion, Digestion, Absorption and Assimilation in Humans>Absorption

In the villi of ileum the absorption of lipids takes place through

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Science>Biology>Ingestion, Digestion, Absorption and Assimilation in Humans>Absorption

The function of finger like projections called “villi” in small intestine is to :

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Science>Biology>Ingestion, Digestion, Absorption and Assimilation in Humans>Absorption

Which of the following is not a secretion in human beings?

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Science>Biology>Ingestion, Digestion, Absorption and Assimilation in Humans>Absorption

You have two test tubes ‘A’ and ‘B’. Test tube ‘A’ contains some pieces of boiled corns while the test tube ‘B’ contains boiled and chewed corns. Which test tube will give blue-black colour with iodine solution? Why?

MEDIUM

Science>Biology>Ingestion, Digestion, Absorption and Assimilation in Humans>Absorption

If a piece of chapati is chewed for some time, it tastes sweeter. Why?

MEDIUM

Science>Biology>Ingestion, Digestion, Absorption and Assimilation in Humans>Absorption

Why do we get instant energy from glucose?

MEDIUM

Science>Biology>Ingestion, Digestion, Absorption and Assimilation in Humans>Absorption

Match the words in column A with those in column B.

Column A	Column B
a. Cow	p. Long, sticky tongue
b. Mosquito	q. Long trunk
c. Frog	r. Chews the cud
d. Elephant	s. Sharp mouthparts

MEDIUM

Science>Biology>Ingestion, Digestion, Absorption and Assimilation in Humans>Absorption

Match the following:

Column A	Column B
1. Carbohydrates	(i) Fatty acids and glycerol
2. Proteins	(ii) Sugar
3. Fats	(iii) Amino acids

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Science>Biology>Ingestion, Digestion, Absorption and Assimilation in Humans>Absorption

We should not chew our food.

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Science>Biology>Ingestion, Digestion, Absorption and Assimilation in Humans>Absorption

Why should we chew our food properly?

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Science>Biology>Ingestion, Digestion, Absorption and Assimilation in Humans>Absorption

How do cows and buffaloes eat their food? Name their way of eating.

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Science>Biology>Ingestion, Digestion, Absorption and Assimilation in Humans>Absorption

Match the items of column I with those given in column II.

Column I	Column II
Food components	Products of digestion
(i) Carbohydrates	(a) Fatty acids and glycerol
(ii) Proteins	(b) Sugar (Glucose)
(iii) Fats	(c) Amino acids

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Science>Biology>Ingestion, Digestion, Absorption and Assimilation in Humans>Absorption

If you skip your meals continuously for a few days, you start having problems with your digestion. Explain.

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Science>Biology>Ingestion, Digestion, Absorption and Assimilation in Humans>Absorption

Saliva is produced here.

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Science>Biology>Ingestion, Digestion, Absorption and Assimilation in Humans>Absorption

Saliva contains enzymes.

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Science>Biology>Ingestion, Digestion, Absorption and Assimilation in Humans>Absorption

Define ingestion.

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Science>Biology>Ingestion, Digestion, Absorption and Assimilation in Humans>Absorption

Why does the food you eat have to be digested?

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Science>Biology>Ingestion, Digestion, Absorption and Assimilation in Humans>Absorption

What is meant by digestion? Name the various organs of the human digestive system. Also name the associated glands. Draw a labelled diagram of the human digestive system.

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Science>Biology>Ingestion, Digestion, Absorption and Assimilation in Humans>Absorption

What happens to the food in small and large intestines?

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Science>Biology>Ingestion, Digestion, Absorption and Assimilation in Humans>Absorption

What happens to the undigested food in the body?

Lacteals absorb and transport large molecules, fats, and lipids in the digestive system mainly in the form of lipoproteins.

Important Questions on Ingestion, Digestion, Absorption and Assimilation in Humans

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