Tag: digestive system of human

Questions Related to digestive system of human

Dental formula in human beings 

biology digestive system of human buccal cavity digestive system - organs coordination in the process of digestion

  1. $\dfrac{3223}[3223}$

  2. $\dfrac{2123}[2123}$

  3. $\dfrac{1232}[1232}$

  4. $\dfrac{2233}[2233}$

Show answer
Correct Option: B
Explanation:

The correct answer is (b).

Dental formula refers to 

biology digestive system of human buccal cavity digestive system - organs coordination in the process of digestion

  1. The minimum number of teeth in one half of one jaw

  2. The number of each type of tooth in one half of one jaw

  3. The overall geometric shape of the jaw

  4. Maximum number of teeth in the mouth

Show answer
Correct Option: A
Explanation:

In each set of teeth, incisors (I) are indicated first, canines (C) second, premolars (P) third, and finally molars (M), giving I:C:P:M which is the minimum number of teeth in one half of one jaw. 

So, 'the correct option is 'The minimum number of teeth in one half of one jaw'.

Identify typical dental formula of a metatherian.

biology digestive system of human buccal cavity digestive system - organs coordination in the process of digestion

  1. i 5/4. c 1/1, pm 3/3, m 4/4

  2. i 3/3, c 1/1, pm 4/4, m 3/3

  3. i 4/3, c 1/1, pm 3/3, m 4/4

  4. i 4/5, c 1/1, pm 3/3, m 4/4

Show answer
Correct Option: A
Explanation:

There is only one set of teeth functional throughout life with the exception of a milk molar which is replaced by the last premolar. Incisors are more numerous than in placentals. 3 premolars and 4 molars as against 4 P and 3 M in placentals. Dentition in opossum is I 5/4, C 1/1, P 3/3, M 4/4. 


So, the correct option is 'Option A'.

What is the basic difference between fertilizers and manures?

bio-chemistry digestive system of human absorption mechanism absorption digestion

  1. Fertilizers are natural and manures are artificial

  2. Fertilizers are artificil and manures are natural

  3. Fertilizers increase the fertility of the soil and manures reduce the fertility of the soil

  4. Fertilizers prevents the growth of crop and manures increase the fertility of the soil

  5. None of these

Show answer
Correct Option: B
Explanation:

  • Fertilizers are  chemicals manufactured industrially, added to soil or land to increase its fertility.
  • Manure is organic matter, mostly derived from animal feces except which can be used as organic fertilizer in agriculture.

So, the correct option is 'Fertilizers are artificial and manures are natural'.

.......... is the form in which digested fats are absorbed into the intestinal walls.

bio-chemistry digestive system of human absorption mechanism absorption digestion

  1. Chylomicrons

  2. Micelles

  3. Bile salts

  4. Both A and B

Show answer
Correct Option: B
Explanation:

Micelles are formed when bile emulsifies the fat which makes it water soluble and can be absorbed by the intestinal wall. Later on, they convert into chylomicrons by coating them with proteins are absorbed by the lymph vessels which transport it into a blood and then it reaches the cell.

So the correct option is 'Micelles'.

Which of the following is TRUE regarding micelles in the intestine?

bio-chemistry digestive system of human absorption mechanism absorption digestion

  1. Micelles are very small fat molecules

  2. Micelles are small spherical water soluble droplets

  3. Micelles help fatty acids and glycerol to be absorbed in to the lymph vessels

  4. Micelles are also called chylomicrons

Show answer
Correct Option: B,C
Explanation:

Micelles are formed when bile emulsifies the fat which makes it water soluble and can be absorbed by the intestinal wall, later on, they convert into chylomicrons by coating them with proteins are absorbed by the lymph vessels which transport it into a blood and then it reaches the cell.

So the correct option is 'Micelles are small spherical water-soluble droplets and Micelles help fatty acids and glycerol to be absorbed into the lymph vessels'.

Chylomicrons are protein coated small fat globules formed in

bio-chemistry digestive system of human absorption mechanism absorption digestion

  1. Lumen of intestine

  2. Lacteals of villi

  3. Cells of mucosa

  4. Blood vessels of villi

Show answer
Correct Option: A
Explanation:
Chylomicrons are protein coated small fat globules formed in lumen of the small intestine, it is in this form that the fats are absorbed across the intestinal lumen into the circulatory system
So, the correct answer is 'Lumen of intestine'

Which of the following chemical substance is absorbed by passive transport from the intestine?

bio-chemistry digestive system of human absorption mechanism absorption digestion

  1. Glucose

  2. Galactose

  3. Amino acid

  4. Fructose

Show answer
Correct Option: A
Explanation:
The chemical substance which is absorbed by the passive transport from the intestine is glucose, transported by SGLUT 1 and SGLUT 2
So, the correct answer is 'Glucose'

The absorption of nutrients, like amino acids, occurs via co-transport channels, which couple with the movement of $Na+$. Which of the following statement is true for this type of co-transport?

bio-chemistry digestive system of human absorption mechanism absorption digestion

  1. In this both amino acids and $Na+$ move down a electrochemical gradient.

  2. Both amino acids and $Na+$ are absorbed agfainst the electrochemical gradient

  3. Amino acids are absorbed against the electrochemical gradient and $Na+$ moves towards the electromagnetic gradient.

  4. Amino acids move towards the electrochemical gradient and $Na+$ against the electrochemical gradient.

Show answer
Correct Option: D
Explanation:
The transport of amino acids takes place with the help of co-transporters where amino acids move along the concentration gradient while Na^+ moves against the concentration gradient. 
So, the correct answer is 'Amino acids move towards the electrochemical gradient and Na+Na+ against the electrochemical gradient'

Fatty acids and glycerol are first absorbed by

bio-chemistry digestive system of human absorption mechanism absorption digestion

  1. Lymph vessels

  2. Blood

  3. Blood capillaries

  4. Hepatic portal vein

Show answer
Correct Option: A
Explanation:

Triglycerides are emulsified by bile and hydrolyzed by the enzyme lipase, resulting in a mixture of fatty acids and monoglycerides. These then pass from the intestinal lumen into the enterocyte, where they are re-esterified to form triacylglycerol. The triacylglycerol is then combined with phospholipids, cholesterol ester, and apolipoprotein to form chylomicrons. These chylomicrons then pass into the lacteals, forming a milky substance known as chyle. The lacteals merge to form larger lymphatic vessels that transport the chyle to the thoracic duct where it is emptied into the bloodstream at the subclavian vein.