Tag: digestive system of human

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Questions Related to digestive system of human

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

Dental formula refers to 

  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
Reveal answer Fill a bubble to check yourself
A Correct answer
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'.

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

Identify typical dental formula of a metatherian.

  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
Reveal answer Fill a bubble to check yourself
A Correct answer
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'.

Multiple choice bio-chemistry digestive system of human absorption mechanism absorption digestion

What is the basic difference between fertilizers and manures?

  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
Reveal answer Fill a bubble to check yourself
B Correct answer
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'.

Multiple choice bio-chemistry digestive system of human absorption mechanism absorption digestion

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

  1. Chylomicrons

  2. Micelles

  3. Bile salts

  4. Both A and B
Reveal answer Fill a bubble to check yourself
B Correct answer
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'.

Multiple choice bio-chemistry digestive system of human absorption mechanism absorption digestion

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

  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
Reveal answer Fill a bubble to check yourself
B,C Correct answer
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'.

Multiple choice bio-chemistry digestive system of human absorption mechanism absorption digestion

Chylomicrons are protein coated small fat globules formed in

  1. Lumen of intestine

  2. Lacteals of villi

  3. Cells of mucosa

  4. Blood vessels of villi
Reveal answer Fill a bubble to check yourself
A Correct answer
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'
Multiple choice bio-chemistry digestive system of human absorption mechanism absorption digestion

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

  1. Glucose

  2. Galactose

  3. Amino acid

  4. Fructose
Reveal answer Fill a bubble to check yourself
A Correct answer
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'
Multiple choice bio-chemistry digestive system of human absorption mechanism absorption digestion

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?

  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.
Reveal answer Fill a bubble to check yourself
D Correct answer
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'
Multiple choice bio-chemistry digestive system of human absorption mechanism absorption digestion

Fatty acids and glycerol are first absorbed by

  1. Lymph vessels

  2. Blood

  3. Blood capillaries

  4. Hepatic portal vein
Reveal answer Fill a bubble to check yourself
A Correct answer
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.