Absorption & Assimilation in Small Intestine

Q.

How many teeth does a mosquito have?

Q.

What is the difference between absorption and assimilation?

Q.

Question 1 (a)
Fill in the blanks:
(a) The main steps of nutrition in humans are __, __, __, __ and __.

Q.

What is absorption in the human body?

Q. The finger-like outgrowths of amoeba help to ingest food and locomotion. However, the finger-like outgrowths of the human intestine helps to

1. digest the fatty food substances
2. make the food soluble
3. increase surface area for absorption
4. absorb the undigested food

Q.

What is the meaning of the afternoon turned black?

Q.

What happens to digested food after absorption?

Q. Match the following components of food with their digested forms after the action of intestinal juices.

1. Amino acid
2. Fatty acid + Glycerol
3. Glucose

Q. ___ is the name of the small finger-like outgrowths in the small intestine that absorbs digested food.

1. cilia
2. papillae
3. epiglottis
4. villi

Q.

Question 6
The finger-like outgrowths of Amoeba helps to ingest food. However, the finger-like outgrowths of human intestine helps to

(a) Digest the fatty food substances.
(b) Make the food soluble.
(c) Absorb the digested food.
(d) Absorb the undigested food.

Q.

Mark the INCORRECT statement about large intestine

1. Large intestine secrets no enzyme.

2. It consists mainly of undigested material.

3. It stores faeces.

4. It absorbs digested food.

Q. Question 14
Cellulose breaks down into smaller components which are egested as roughage.
Mark the following statements as True or False. If false, write the correct statements.
(a) Tongue is attached to the roof of the mouth cavity at the back.
(b) The large intestine is longer and wider than the small intestine of the human alimentary canal.
(c) Mucus protects the stomach lining from damage.
(d) All heterotrophs have a similar basic process of nutrition.

Q.

Given below are five sets of terms. Arrange and rewrite each so that they are in a logical sequence. Digestion, Ingestion, Absorption, Egestion, Assimilation

Q.

Question 9 (i)
Which part of the digestive canal is involved in:
(i) absorption of food __.

Q. Name the five stages of the process of nutrition in animals.

Q. The length of the small intestine is about ___ m.

1. 10
2. 2
3. 7.5
4. 1

Q. The presence of villi increases the surface area of the small intestine. This helps in the of the digested food.

1. ingestion
2. absorption
3. egestion

Q.

Explain various steps included in the process of nutrition.

Q. The finger-like outgrowths of amoeba help to ingest food and locomotion. However, the finger-like outgrowths of the human intestine helps to

1. digest the fatty food substances
2. make the food soluble
3. increase surface area for absorption
4. absorb the undigested food

Q.

What are steps in animal digestion?

Q. The presence of villi increases the surface area of the small intestine. This helps in the of the digested food.

1. ingestion
2. absorption
3. egestion

Q.

Question 7
Read the following statements with reference to the villi of small intestine.

i) They have very thin walls.
ii) They have a network of thin and small blood vessels close to the surface.
iii) They have small pores through which food can easily pass.
iv) They are finger-like projections.

Identify those statements which enable the villi to absorb digested food.

(a) (i), (ii) and (iv)
(b) (ii), (iii) and (iv)
(c) (iii) and (iv)
(d) (i) and (iv)

Q. What is absorption?

1. Taking digested food into the blood stream
2. Making complex organic molecules in cells using digested foods.
3. Food entering the mouth and being chewed.
4. Food entering the stomach for digestion.

Q. Which of the following converts starch to glucose, proteins to amino acids and fats to glycerol?

1. Gastric juice
2. Bile salts
3. Intestinal juice
4. Pepsinogen

Q. Tiny fingerlike projections in the small intestine are:

1. Villi
2. Flagella
3. Rectum
4. Cillia

Q. Tiny fingerlike projections in the small intestine are:

1. Villi
2. Flagella
3. Cillia
4. Rectum

Q. What is absorption?

1. Food entering the stomach for digestion.
2. Food entering the mouth and being chewed.
3. Taking digested food into the blood stream
4. Making complex organic molecules in cells using digested foods.

Q. Which of these is not a part of nutrition?

(a) digestion
(b) absorption
(c) egestion
(d) excretion