Tag: digestive system of human

Questions Related to digestive system of human

Calcium absorption is always enhanced by the action of the following vitamin

bio-chemistry digestive system of human absorption of food absorption parts of the digestive system: structure and function

  1. Vitamin A

  2. Vitamin B

  3. Vitamin D

  4. Vitamin K

Show answer
Correct Option: C
Explanation:

Vitamin D helps in the absorption of calcium ion from the walls of the duodenum to the bloodstream and also maintains its level in the body.

So the correct option is 'Vitamin D'.

Which of the following is true regarding the absorption mechanism of carbohydrates in the intestine?

bio-chemistry digestive system of human absorption of food absorption parts of the digestive system: structure and function

  1. Glucose is absorbed passively

  2. Galactose is absorbed passively

  3. Fructose is transported actively

  4. Glucose and galactose are transported actively

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Correct Option: D
Explanation:

Glucose and galactose transport against the concentration and hence require energy and carrier which transport them from lumen of the intestine to cell and are co transported with sodium ion.

So the correct option is 'Glucose and galactose are transported actively'

What percentage of amino acids is absorbed in the small intestine?

bio-chemistry digestive system of human absorption of food absorption parts of the digestive system: structure and function

  1. 15%

  2. 30%

  3. 100%

  4. 90-95%

Show answer
Correct Option: D
Explanation:

Initiation of protein digestion starts in the stomach by pepsin but around 90-95% of protein is digested and absorbed in duodenum and jejunum of the small intestine in the form of amino acids by the action of enzymes trypsin, chymotrypsin and carboxypeptidases.

So the correct option is '90-95%'

Which of the following substances are not absorbed into the lymphatic system?

bio-chemistry digestive system of human absorption of food absorption parts of the digestive system: structure and function

  1. Fatty acids

  2. Glycerol

  3. Fat soluble vitamins

  4. Water soluble vitamins

Show answer
Correct Option: D
Explanation:

Water-soluble vitamins are directly absorbed into the intestine and transported to water as they do not require any emulsification because water is free to move in and out but fat soluble liquids absorb into lymph due to their insolubility in water and they need to emulsify before absorption.

So the correct option is 'Water-soluble vitamins'

$30\%$ starch is hydrolysed in Buccal cavity by which of the following enzymes?

bio-chemistry digestive system of human absorption of food absorption parts of the digestive system: structure and function

  1. Pancreatic $\alpha$ -amylase

  2. Lipase

  3. Maltase

  4. Salivary amylase

Show answer
Correct Option: D
Explanation:

Salivary glands in your mouth (Buccal cavity) make salivary amylase, which begins the digestive process by breaking down starch when you chew your food, converting it into maltose, a smaller carbohydrate.

So the correct option is D, salivary amylase.

Cardiac sphincter protects back flow of

bio-chemistry digestive system of human absorption of food absorption parts of the digestive system: structure and function

  1. Food into oesophagus

  2. Blood into heart

  3. Blood into auricle

  4. Blood into venae cavae

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Correct Option: A

Which one provides sliminess to food?

bio-chemistry digestive system of human absorption of food absorption parts of the digestive system: structure and function

  1. Brunners glands

  2. Goblet cells

  3. Both A and B

  4. Peptic cells

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Correct Option: C

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

bio-chemistry digestive system of human absorption of food absorption parts of the digestive system: structure and function

  1. Trypsin

  2. Pepsin

  3. Peptidase

  4. Chymotrypsin

Show answer
Correct Option: C

Digestion of carbohydrates occurs in

bio-chemistry digestive system of human absorption of food absorption parts of the digestive system: structure and function

  1. Buccal cavity

  2. Stomach

  3. Intestine

  4. All the above

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Correct Option: D

Which is true about digestion and absorption of food?

bio-chemistry digestive system of human absorption of food absorption parts of the digestive system: structure and function

  1. 60% starch is hydrolysed by salivary amylase

  2. Oxyntic cells secrete pepsinogen

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

  4. Fructose and amino acids area absorbed in intestine with the help of carrier ions of $Na^+$

Show answer
Correct Option: D