Small Intestine

Q.

What is roughage ? Give two examples.

Q.

What is the role of roughages in our diet?

Q.

Why is the small intestine the most important organ of the digestive system ?

Q.

Question 1 (d)
Fill in the blanks:
(d) The inner wall of the small intestine has many finger-like outgrowths called __.

Q. Microvilli increase the surface area of the small intestine which helps in absorption.

1. True
2. False

Q. Which of the following statement is correct? ​[3 Marks]

A. Small intestine is the site for complete digestion of food.
B.The exit of undigested food from the body is controlled by pyloric sphincter. ​
C. Herbivores eating grass need a longer small intestine to ​allow complete digestion of cellulose.​
D. Absorption of digested food takes place in large intestine with the help of villi.​

Q.

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

Q.

Name the following:

The organ in which the absorption of food takes place in humans.

Q.

What will happen if KOH solution is not used in the small test tube in the experimental set-up to show CO₂ is produced during respiration?

1. CO₂ will not be produced by seeds

2. Water level will rise in bent tube

3. CO₂ will be produced in large volume by germinating seeds

4. (i) CO₂ produced by the germinating seeds will not be absorbed.

   (ii) Water level in the bent tube will not rise up.

Q. Define the following terms: ​
Peristalsis ​

Q.

Which of the given set is mixed with the food in small intestine?

1. Saliva, gastric juice, and bile

2. Gastric juice, bile, and pancreatic juice

3. Bile and pancreatic juice

4. Bile, pancreatic juice and saliva

Q. Which of the following statements is/are incorrect?
(i) Absorption of simple sugar, alcohol, some water and medicines takes place in stomach.
(ii) Maximum water absorption occurs in large intestine.
(iii) Small intestine is the major site of digestion and absorption of food.
(iv) Fatty acid and glycerol are absorbed by lacteals.
(v) Nothing is absorbed in mouth and large intestine.

1. (i), (iv) and (v)
2. (v) only
3. (iv) only
4. (ii) and (iii)

Q. How are fats digested in the human body?

1. Emulsification by bile and digestion by lipase
2. Emulsification by lipase and digestion by bile
3. Emulsification by HCl and digestion by bile
4. Emulsification by HCl and digestion by lipase

Q. Give one example of each of the following:
(b) Germ trapping body secretion.

Q.

Why are proteins described as body-building food?

Q.

We eat food composed of all the nutrients like carbohydrates, proteins, fats, vitamins, minerals and water. After digestion, these are absorbed in the form of glucose, amino acids , fatty acids, glycerol etc.

Q.

Complete the following table by filling in the blanks 1 to 8.

$\begin{array}{c}OrganEnzymeFoodacteduponFinalproduct\\ 1Pepsin23\\ Mouth45Disaccharide\\ 67Maltose8\end{array}$

Q.

Give the technical term for the fluids that transport fatty acids and glycerol.

Q.

Consider the following two statements A & B and select the right from (i) - (iv) about their correctness.

A. Small intestine is shorter than large intestine.

B. Small intestine is wider than large intestine.

Options :

(i) Both the statements are correct.

(ii) Both the statements are wrong.

(iii) Statement A is correct, B is wrong.

(iv) Statement B is correct, A is wrong.

Q. Consider the following statements:

Statement 1: Bile is produced by the Liver.
Statement 2: Pancreatic juice is also secreted by the Liver.

1. Both are correct
2. Both are incorrect
3. Only 1 is correct
4. Only 2 is correct

Q.

Roughage is a very good source of energy.

1. True
2. False

Q. Villi has tiny lymphatic vessels called lacteals.

1. False
2. True

Q.

Which one is body-building material?

1. Minerals

2. Fats

3. Proteins

4. Sugars

Q.

Which of the following processes take place in small intestine?

1. Megavilli

2. Flagella

3. Villi

4. Cilia

Q.

Name the structures in small intestine whose absence would lead to starvation of cells in the body.

1. Cristae

2. Flagella

3. Cilia

4. Villi

Q.

The main function of the small intestine is:

1. Absorption

2. Egestion

3. Ingestion

4. Digestion

Q. Which of the following examples of food under P, Q and R correctly match the descriptions?
P: Supplies materials for building up muscles.
Q: Supplies a lot of energy.
R: Supplies high dietary fibre.

1. P - Fish
   Q - Lettuce
   R - Palm oil

2. P - Butter
   Q - Lettuce
   R - Fish

3. P - Butter
   Q - Mutton
   R - Palm oil

4. P - Mutton
   Q - Butter
   R - Cabbage

Q. The first loop of the small intestine is called:

1. Jejunum
2. Ileum
3. Duodenum
4. Colon

Q.

Match the following.

$\begin{array}{cc}\text{a. Pepsinogen is secreted}& \text{i) Liver}\\ \text{b. Trypsin is secreted}& \text{ii)Pancreas}\\ \text{c. Bile is produced}& \text{iii) Gall bladder}\\ \text{d. Bile is stored in}& \text{iv) Gastric glands}\end{array}$

1. $a\to IV,b\to II,c\to I,d\to III$

2. $a\to I,b\to III,c\to II,d\to IV$

3. $a\to IV,b\to III,c\to II,d\to I$

4. $a\to III,b\to II,c\to IV,d\to I$

Q.

Nucleic acids are polymers of

1. Amino acids

2. Nucleotides

3. Nitrogenous bases

4. Nucleosides