Tag: liver

Quizzes (2) Questions (207)

Questions Related to liver

Multiple choice biology digestion and absorption liver functions of the liver secretory organs

Bile juice helps in the digestion of fats due to presence of

  1. Bile salts

  2. Bile pigments

  3. Enzymes

  4. HCl
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Bile salts (like sodium glycocholate) lower the surface tension of fat droplets, breaking them into smaller particles to increase the surface area for lipase action.

Multiple choice biology digestion and absorption liver functions of the liver secretory organs

Consider the following statements :I. Nicotinamide (anti pellagra) occurs in milk, yeast, meat and leafy vegetables
II. Crypts of Lieberkuhn occur in liver
III. Steapsin is pancreatic amylase

  1. II and III are correct

  2. II and III are incorrect

  3. I and II are correct

  4. I and III are correct

  5. I and III are incorrect
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Nicotinamide is indeed a vitamin (B3). Crypts of Lieberkuhn are in the small intestine, not the liver. Steapsin is pancreatic lipase, not amylase. Thus, statements II and III are incorrect.

Multiple choice biology digestion and absorption liver functions of the liver secretory organs

Organs functioning as modulator and effector for homeostatic control of blood sugar are respectively

  1. Liver and islets of Langerhans

  2. Islets of Langerhans and hypothalamus

  3. Hypothalamus and islets of Langerhans

  4. Hypothalamus and liver.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The liver acts as a modulator by storing or releasing glucose (glycogenolysis/glycogenesis), while the islets of Langerhans (pancreas) act as effectors by secreting insulin and glucagon to control blood sugar levels.

Multiple choice biology digestion and absorption liver functions of the liver secretory organs

Angiotensinogen is a protein produced by

  1. Macula densa cells

  2. Liver cells

  3. Juxtaglomerular cells

  4. Endothelial cells
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Angiotensinogen is a plasma protein produced and secreted by liver cells. It is a sole precursor of all angiotensin peptide. Juxtaglomerular cells secrete renin which acts on angiotensinogen to release angiotensin I and then it is converted to angiotensin II by the action of enzyme angiotensin-converting enzymes.
So, the correct answer is 'Liver cells'.
Multiple choice biology digestion and absorption liver functions of the liver secretory organs

If liver is removed, which component of blood will increase?

  1. Ammonia

  2. Protein

  3. Uric acid

  4. Urea
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • Animals accumulate ammonia, urea, uric acid, carbon dioxide, water and ions like Na +, K+, Cl–, phosphate, sulphate, etc., either by metabolic activities or by other means like excess ingestion. 
  • These substances have to be removed totally or partially. Ammonia, urea and uric acid are the major forms of nitrogenous wastes excreted by the animals.  Ammonia is rapidly removed from the liver by urea cycle.
  • Urea cycle takes place in the liver in which the ammonia is converted into a water-soluble compound known as urea. Urea formed is a non-toxic excretion product whereas Ammonia is toxic to the CNS because it reacts with the α-ketoglutarate to form glutamate. Hence, If the liver is removed, which component of blood will increase is ammonia.
So, the correct answer is 'ammonia'.