Absorption of Food

Q.

What are villi? What are their location and function?

Q.

What do we call a process by which fructose is absorbed into the blood through the mucosa cells of the intestine?

1. Co-transport mechanism

2. Facilitated transport

3. Active transport

4. Simple diffusion

Q. Select the correct match of the digested products in humans with their absorption site and mechanism.

1. Cholesterol, maltose - Large intestine - Active absorption
2. Glycine, glucose - Small intestine - Active absorption
3. Glycerol, fatty acids - Duodenum - Move as chilomicrons
4. Fructose, $N{a}^{+}$ - Large intestine - Passive absorption

Q.

What is the function of lacteal in the small intestine?

Q.

Define absorption.

Q.

Which is the first enzyme to mix with food?

Q. Select the correct match of the digested products in humans given in column I with their absorption site and mechanism in column II.

	Column I	Column II
(A)	Cholesterol, Maltose	Large intestine, active absorption
(B)	Glycine, glucose	Small intestine, active absorption
(C)	Fructose, Na+	Small intestine, passive absorption
(D)	Glycerol, fatty acid	Duodenum, move as chylomicrons

1. A
   
2. B
3. C
4. D

Q.

Which part of the digestive canal is involved in the formation of faeces?

Q.

Which of the following is absorbed into the blood capillary of the villus by facilitated diffusion?

1. Fructose
2. Fatty acids
3. Glucose
4. Amino acids

Q. Chylomicrons are small lipoproteins transported from intestine into blood stream. Is this correct

Q. Glucose is absorbed into the blood vessels by ____________ process.

1. active transport
2. both a and c
3. facilitated diffusion
4. simple diffusion

Q. What is assimilation ?

Q. Micelle formation is necessary for the intestinal absorption of:

1. Vitamin B${}_{12}$
2. Glycerol
3. Bile acids
4. Vitamin D

Q.

List the types of cells found in salivary glands and their functions.

Q. Absorption of water from soil by dry seeds increases the thus helping seedlings to come out of soil.

Q. Assertion- The cells lining the villi help in absorption.
Reason- The cells lining villi have numerous microscopic projections which increase the surface area enormously.

1. Both assertion and reason are true and the reason is the correct explanation of the assertion
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion
3. The assertion is true but the reason is false
4. Both assertion and reason are false

Q. Assertion : Water and electrolytes are almost fully absorbed in the large intestine.

Reason : In large intestine, haustral contractions (slow segmenting movements) roll the forming faeces over and over, causing absorption of water and electrolytes

1. If both assertion and reason are true and reason is the correct explanation of assertion
2. If both assertion and reason are true but reason is not the correct explanation of assertion
3. If both assertion and reason are false
4. If assertion is true but reason is false.

Q.

Correct the statements given below by the right option shown in the bracket against them.
(a) Absorption of amino acids and glycerol takes place in the (small intestine/ large intestine).
(b) The faeces in the rectum initiate a reflex causing an urge for its removal (neural/ hormonal).
(c) Skin and eyes turn yellow in infection (liver/stomach). (d) Rennin is a proteolytic enzyme found in gastric juice in (infants/ adults).
(e) Pancreatic juice and bile are released through (intestine pancreatic/ hepato-pancreatic duct).
(f) Dipeptides, disaccharides and glycerides are broken down into simple substances in region of small intestines (jejunum/ duodenum).

Q.

The solution used to test the starch in a leaf

1. Water is used

2. Chemical is used

3. Iodine solution is used

4. Alcohol is used

Q. Select what is not true for intestinal villi among the following.

1. They possess microvilli
2. They increase the surface area
3. They are supplied with capillaries and the lacteal vessels
4. They only participate in digestion of fats

Q.

What is meant by egested waste?

Q. The process by which the digested products pass through the internal mucosa of the digestive tract into the blood or lymph is called ___________

1. absorption
2. assimilation
3. digestion
4. adsorption

Q.

Explain the following term:

Assimilation

Q. Assertion- The cells lining the villi help in absorption.
Reason- The cells lining the villi have numerous microscopic projections which increase the surface area enormously.

1. Both assertion and reason are true and the reason is the correct explanation of the assertion
2. Both assertion and reason are true but the reason is not the correct explanation of the assertion
3. The assertion is true but the reason is false
4. Both assertion and reason are false

Q. The food materials present in the storage organs are later re-exported.

1. True

2. False

Q.

The correct sequence of starch test in leaf should be

(I) Removal of black paper strips, boiling in water, testing with iodine solution.

(ii) Removal of black paper strips, boiling in alcohol over water bath, washing the boiled leaf, testing with iodine solution.

(iii) Removal of black paper strips, boiling in iodine solution, washing with water.

1. (i)

2. (ii)

3. (iii)

4. (i), (ii), (iii)

Q.

What are villi?

Q.

What is an open gut?

Q. If energy is used for absorption of nutrients, it is called transport and if energy is not used, then it is known as transport.

1. active
2. passive
3. dynamic
4. dormant

Q.

What is the role of villi in the absorption of food? Differentiate between absorption and assimilation.