Digestion and Absorption Test

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Digestion and Absorption Test - 81

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Weekly Quiz Competition

Question 1
1 / -0

Starting from the mouth, which enzymes are likely to act on the baked potato eaten by a man, as it moves down the alimentary canal?

A
Disaccharidase like maltase, lipases, nucleases

B
Salivary amylase, pancreatic amylase, disaccharidases

C
Salivary maltase, carboxypeptidase, trypsinogen

D
Pancreatic amylase, salivary amylase, lipases

Solution

Baked potatoes consist of starch which is a polysaccharide. In oral cavity, the food is mixed with saliva. The saliva contains an enzyme called salivary amylase (also called ptyalin) which converts starch into maltose, isomaltose and small dextrins. Salivary amylase is activated in the saliva by the chloride ions. The pancreatic juice (present in small intestine) contains starch digesting enzyme, called pancreatic amylase which converts starch into maltose, isomaltose and α-dextrins.
Hence, the correct answer is option B.
Question 2
1 / -0

In jejunum, enzyme required for digestion of amino acid containing compounds is

A
Trypsin

B
Pepsin

C
Peptidase

D
Chymotrypsin
Question 3
1 / -0

Bile salts activate enzyme

A
Pepsinogen

B
Trypsinogen

C
Lipase

D
Pancreatic amylase
Question 4
1 / -0

Vomiting is related to disturbance in

A
Stomach sometimes duodenum

B
Hypothalamus

C
Gastrointestinal tract

D
Hapothalamus
Question 5
1 / -0

Which is true about digestion and absorption of food?

A
60% starch is hydrolysed by salivary amylase.

B
Oxyntic cells secrete pepsinogen.

C
Chylomicrons are small lipoprotein particles passed in intestine into blood capillaries.

D
Amino acids are absorbed in intestine with the help of carrier ions of $$Na^+$$.
Solution
- Salivary amylase is present in the saliva converts starch into maltose. 30% of starch is hydrolysed by salivary amylase.
- Oxyntic cells or parietal cell is a type of gastric gland which secretes $$HCl$$ and castle's intrinsic factor.
- Chylomicrons are present in the blood and lymphatic fluid, where they transport fat molecules from the intestine to the liver.
- Amino acids are absorbed along with $$Na^+$$ ions by facilitated diffusion.
Hence, the correct answer is option D, i.e., Amino acids are absorbed in the intestine with the help of carrier ions of $$Na^+$$.
Question 6
1 / -0

Which of the following correctly describes the oesophagus?

A
Food moves through the oesophagus under voluntary control

B
Food enters the oesophagus from the pyloric region of the stomach

C
It allows the passage of chyme

D
It is a collapsible muscular tube extending from pharynx to stomach
Solution
The oesophagus is a long, muscular tube that connects the mouth to the stomach. It's around 25cm (10 in) long in adults.
When you swallow food, the walls of the oesophagus squeeze together (contract).
This moves the food down the oesophagus to the stomach. Hence, the oesophagus is a collapsible muscular tube extending from pharynx to stomach.
So, the correct answer is ' collapsible muscular tube extending from pharynx to stomach'.
Question 7
1 / -0

$$C$$ shaped structure of alimentary canal is

A
Stomach

B
Duodenum

C
Oesophagus

D
Vermiform appendix

Solution

The human digestive system consists of the alimentary canal and the associated glands.The alimentary canal begins with an anterior opening – the mouth, and it opens out posteriorly through the anus. The alimentary canal consists of mouth, pharynx, esophagus, stomach, small intestine, large intestine, and anus. The small intestine is the longest part of the alimentary canal and comprises three parts- Duodenum, Jejunum, and Ileum. Duodenum– C shaped and receives the hepatopancreatic duct formed by the union of bile and pancreatic duct. Jejunum– Middle part of small intestine with thick walls and more vasculature. Ileum– Lower part of the small intestine with thin walls and less vasculature. So, the correct option is 'Duodenum'.
Question 8
1 / -0

Read carefully the following statements regarding the absorption of nutrients. Find the incorrect statements and choose the correct option from the given below codes.
I) Absorption of carbohydrates takes place in the stomach and jejunum part of intestine.
II) The water soluble end products of food can reach the blood and lymph directly.
III) Large intestine and buccal cavity do not functions as the site of absorption.
IV) Large intestine is the site of absorption of about $$99\%$$ of the total water present in the hydrolyzed food.

A
I,III and IV are incorrect

B
I,II and IV are incorrect

C
I and II are incorrect

D
III and IV are incorrect

Solution

Absorption of carbohydrates takes place in the duodenum, first part of the small intestine. Water-soluble end products of food can be directly absorbed into the bloodstream from the intestine by both passive and active mechanisms. The majority of absorption of water and minerals takes place through the large intestine. Buccal cavity acts as a site of absorption of glucose directly into the bloodstream. The large intestine is the site of absorption of about 80% of the total water present in the hydrolyzed food.
Thus, the correct answer is 'I, III and IV are incorrect'.
Question 9
1 / -0

Which of the following food items are sources of sucrose, starch and cellulose respectively?

A
Meat, fruits and potatoes

B
Spanish, corn and meat

C
Table sugar, rice and grass

D
Fruits, eggs and wheat
Question 10
1 / -0

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
Glycine, glucose Small intestine, active absorption

B
Fructose, $${Na}^{+}$$ Small intestine, passive absorption

C
Bile acids, fatty acids Duodenum, move as chilomicrons

D
Cholesterol, maltose Large intestine, active absorption
Solution
Answer-
The small intestine is the principal organ for the absorption of nutrients.
Amino acids like glycine, monosaccharides like glucose absorbed into the blood by active absorption.
Fructose is absorbed by facilitated absorption while Na+ is by active absorption in the small intestine.
Bile acids are absorbed in ileum region by active absorption.
Fatty acids, cholesterol are absorbed as chylomicrons by lacteals and then drain into the bloodstream.
Maltose is broken down into glucose by maltase then that glucose is absorbed by simple diffusion in the small intestine.

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Digestion and Absorption Test - 81

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Digestion and Absorption Test - 81

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Question 1

Disaccharidase like maltase, lipases, nucleases

Salivary amylase, pancreatic amylase, disaccharidases

Salivary maltase, carboxypeptidase, trypsinogen

Pancreatic amylase, salivary amylase, lipases

Solution

Question 2

Trypsin

Pepsin

Peptidase

Chymotrypsin

Question 3

Pepsinogen

Trypsinogen

Lipase

Pancreatic amylase

Question 4

Stomach sometimes duodenum

Hypothalamus

Gastrointestinal tract

Hapothalamus

Question 5

60% starch is hydrolysed by salivary amylase.

Oxyntic cells secrete pepsinogen.

Chylomicrons are small lipoprotein particles passed in intestine into blood capillaries.

Amino acids are absorbed in intestine with the help of carrier ions of $$Na^+$$.

Solution

Question 6

Food moves through the oesophagus under voluntary control

Food enters the oesophagus from the pyloric region of the stomach

It allows the passage of chyme

It is a collapsible muscular tube extending from pharynx to stomach

Solution

Question 7

Stomach

Duodenum

Oesophagus

Vermiform appendix

Solution

Question 8

I,III and IV are incorrect

I,II and IV are incorrect

I and II are incorrect

III and IV are incorrect

Solution

Question 9

Meat, fruits and potatoes

Spanish, corn and meat

Table sugar, rice and grass

Fruits, eggs and wheat

Question 10

Glycine, glucose Small intestine, active absorption

Fructose, $${Na}^{+}$$ Small intestine, passive absorption

Bile acids, fatty acids Duodenum, move as chilomicrons

Cholesterol, maltose Large intestine, active absorption

Solution

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