Tag: biology

Questions Related to biology

Which of the following is not an excretory organ ???

biology digestion and absorption liver functions of the liver secretory organs

  1. Liver

  2. kidney

  3. Book lungs

  4. Hepatopancreas

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Correct Option: A

What is the important function of bile ________________.

biology digestion and absorption liver functions of the liver secretory organs

  1. For digestion by emulsification of fats

  2. Elimination of excretory products

  3. For digestion by enzymes

  4. Coordination of digestive activities

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Correct Option: A

Statement 1: Blood sugar level falls rapidly after hepatectomy.


Statement 2: The glycogen of the liver is the principal source of blood sugar in case of an emergency.

biology digestion and absorption liver functions of the liver secretory organs

  1. Both statements 1 and 2 are correct.

  2. Statement 1 is correct but statement 2 is incorrect.

  3. Statement 1 is incorrect but statement 2 is correct.

  4. Both statements 1 and 2 are incorrect.

Show answer
Correct Option: B
Explanation:
  • In the liver, Glycogen a reserve food material is changed into glucose(sugar) (by gluconeogenesis) and released into the blood. when hepatectomy(surgical removal of the liver) is done it leads to rapid fall of blood sugar. Hence Blood sugar level falls rapidly after hepatectomy is a correct statement.
  • During emergency conditions, the liver can convert proteins and fats i.e gluconeogenesis. Hence The glycogen of the liver is the principal source of blood sugar in case of emergency.is an incorrect statement
  • So, the correct answer is 'Statement 1 is correct but statement 2 is incorrect'.

Which of the following is not a function of the liver in adults?

biology digestion and absorption liver functions of the liver secretory organs

  1. Make red blood cells

  2. Produce urea

  3. Store glucose

  4. Produce bile

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Correct Option: A
Explanation:
The liver performs a variety of functions such as synthesis, storage and secretion of various substances. The functions performed by the liver are:
  • The liver secretes bile juice.
  • The liver plays a key role in carbohydrates metabolism, in lipid metabolism.
  • It also helps in deamination of proteins and conversion of ammonia into urea.
  •  It is the chief organ of detoxification of toxic substances in food.
  • It acts as a thermoregulatory organ like skeletal muscle. as it has high glucose at its disposal.
  • It acts as a haematopoietic organ in the foetus and erythroclastic organ i.e. destruction of the red blood cells in the adult. Hence, Making of red blood cells is not a function of the liver in adults.
So, the correct answer is 'make red blood cells'.

Twenty-four hours after removing the liver of a mammal the concentrations of urea and amino acids in the blood would be changed in which of the following ways?

biology digestion and absorption liver functions of the liver secretory organs

  1. Both urea and amino acid levels would have risen

  2. There would be no change in the level of either

  3. The amino acid level would have risen while the urea level would have fallen

  4. The urea level would have risen while the amino acid level would have fallen

Show answer
Correct Option: C
Explanation:

Urea is produced in the liver which is a breakdown product of amino acids if the liver is removed amino acids will not be metabolized and urea level will rise.

So, the correct option is 'The amino acid level would have risen while the urea level would have fallen'.

Consider the following four statements. and select the correct option stating which ones are true (T) and which ones are false (F).
(i) The stomach has the lowest pH.
(ii) The liver contains lipid emulsifier.
(iii) Large intestine secretes many enzymes.
(iv) All proteases function in the lumen of small intestine.

biology digestion and absorption liver functions of the liver secretory organs

  1. T F T F

  2. F T F T

  3. F F T T

  4. T T F F

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Correct Option: D

Largest digestive gland in the human body is

biology digestion and absorption liver functions of the liver secretory organs

  1. Liver

  2. Pancreas

  3. Gall bladder

  4. None of the above

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Correct Option: A
Explanation:

The digestive glands associated with the alimentary canal include the salivary glands, the liver and the pancreas. Liver is the largest gland of the body weighing about 1.2 to 1.5 kg in an adult human. It is situated in the abdominal cavity, just below the diaphragm and has two lobes. The hepatic lobules are the structural and functional units of liver containing hepatic cells arranged in the form of cords. Each lobule is covered by a thin connective tissue sheath called the Glissons capsule. The bile secreted by the hepatic cells passes through the hepatic ducts and is stored and concentrated in a thin muscular sac, called the gall bladder. The duct of gall bladder (cystic duct) along with the hepatic duct from the liver forms the common bile duct.

Liver is the largest gland and is associated with various functions, choose one which is not correct. 

biology digestion and absorption liver functions of the liver secretory organs

  1. Metabolism of carbohydrate

  2. Digestion of fat

  3. Formation of bile

  4. Secretion of hormone called gastrin

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Correct Option: D
Explanation:

Gastrin is a peptide hormone that stimulates secretion of gastric acid by the parietal cells of the stomach.

So, the correct option is 'Secretion of hormone called gastrin'.

Liver does not store which of the following

biology digestion and absorption liver functions of the liver secretory organs

  1. Vitamin A

  2. Vitamin B

  3. Fats

  4. Bile pigments

  5. Both C and D

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Correct Option: D
Explanation:

Fat builds up in the liver cells, when the liver fails to break down, transfer and store fat effectively, causing abnormal liver function and inflammation, which can lead to liver scarring (known as cirrhosis). The main pigment in bile, bilirubin, is a waste product that is formed from hemoglobin (the protein that carries oxygen in the blood) and is excreted in bile. About half the bile secreted between meals flows directly through the common bile duct into the small intestine. The rest of the bile is diverted through the cystic duct into the gallbladder to be stored. Liver stores the fat soluble vitamins (A,D, E & K) and Vit B12.

Fibrinogen is formed in the

biology digestion and absorption liver functions of the liver secretory organs

  1. Bone marrow.

  2. Lungs.

  3. Liver.

  4. WBCs.

Show answer
Correct Option: C
Explanation:

Fibrin is a tough protein substance that is arranged in long fibrous chains; it is formed from fibrinogen, a soluble protein that is produced by the liver and found in blood plasma. In the clotting mechanism, fibrin threads form a meshwork for the basis of a blood clot. Most of the fibrinogen in the circulating blood is formed in the liver.