Tag: digestive system of human

Questions Related to digestive system of human

Alloxan treatment destroys 

biology digestive system of human digestive glands liver pancreas

  1. STH cells

  2. Sertoli cells

  3. Leydig's cells

  4. $\beta$- cells of islets of Langerhans

Show answer
Correct Option: D
Explanation:
A. STH or somatotropin hormone is known as growth hormone and stimulates body growth and carbohydrate, protein, fat metabolism.
B. Sertoli cells are part of seminiferous tubules and help in spermatogenesis (production of sperms from germ cells) as they provide nourishment to the developing sperms.
C. Leydig cells, also known as interstitial cells are present in the testis near seminiferous tubules. They secrete testosterone hormone which helps in the development of secondary sexual characteristics in males.
D. ββ-cells of islets of Langerhans are part of pancreas and secrete insulin hormone which regulate blood glucose levels.
Alloxan is a toxic analogue of glucose which destroys insulin producing cells of pancreas i.e. ββ-cells of islets of Langerhans.
So, the correct answer is 'ββ-cells of islets of Langerhans'.

Glucagon is produced by 

biology digestive system of human digestive glands liver pancreas

  1. Peptic cells

  2. Oxyntic cells

  3. Alpha cells

  4. Beta cells

Show answer
Correct Option: C
Explanation:
A. Peptic cells secrete pepsinogen (inactive form of pepsin enzyme that degrades proteins).
B. Oxyntic cells, also known as parietal cells, secrete HCl (Hydrochloric acid) in the stomach.
C. Alpha cells are part of islets of Langerhans in pancreas and secrete glucagon hormone which increases blood sugar level.
D.  Beta cells are part of islets of Langerhans in pancreas and secrete insulin hormone which decreases blood sugar level.
So, the correct answer is 'Alpha cells'.

The gland which is exocrine and endocrine is 

biology digestive system of human digestive glands liver pancreas

  1. Adrenal

  2. Pituitary

  3. Pancreas

  4. Liver

Show answer
Correct Option: C
Explanation:
A. Adrenal gland is present on upper side of kidneys and has two parts, adrenal cortex which secrete glucocorticoids, mineralocorticoids and sexocorticoids and adrenal medulla which secrete adrenaline and nor-adrenaline hormone.
B. Pituitary gland is the master gland that regulates the activity of other endocrine glands and secretes many hormones like growth hormone, follicle stimulating hormone, thyroid stimulating hormone etc.
C. Pancreas is a heterocrine gland as it acts both as endocrine and exocrine gland. It secretes insulin hormone into blood and act as endocrine gland and when it secretes digestive enzymes and juice through pancreatic duct, it acts as exocrine gland.
D. Liver is an organ found in vertebrates which bile juice that helps in the digestion of fats.
So, the correct answer is 'Pancreas'.

Where in the body is the pancreas located?

biology digestive system of human digestive glands liver pancreas

  1. It is located behind the stomach.

  2. It is located behind the liver.

  3. It is located in front of stomach.

  4. It is located in front of liver.

Show answer
Correct Option: A
Explanation:

The pancreas is an organ found in the abdomen. It is located behind the stomach. The head of the pancreas is on the right side of the abdomen. It plays important role in converting the food into fuel. It helps in digestion. It also produces hormone insulin which regulates blood sugar.

Thus, the correct answer is 'It is located behind the stomach.'

Exocrine part of pancreas for release of pancreatic salt is stimulated by _____________.

biology digestive system of human digestive glands liver pancreas

  1. Secretin

  2. Gastrin

  3. OCK

  4. Gastric inhibitory peptide

Show answer
Correct Option: A

Which is the largest gland in human body?

biology digestive system of human digestive glands liver pancreas

  1. Pancreas

  2. Liver

  3. Thyroid

  4. Pituitary

Show answer
Correct Option: B
Explanation:
Liver is the largest gland in the human body that secretes bile
So, the correct answer is 'Liver'

Which of the following organs is responsible for storing excess bile produced by the liver?

biology digestive system of human digestive glands liver pancreas

  1. Gall bladder

  2. Pancreas

  3. Duodenum

  4. Spleen

Show answer
Correct Option: A
Explanation:

The liver produces bile, which is stored in the gall bladder before entering the bile duct into the duodenum

So, the correct answer is 'Gall bladder'

The chief function of bile juice is to:

biology digestive system of human digestive glands liver pancreas

  1. emulsify fats for digestion

  2. emulsify proteins for digestion

  3. regulate digestion of proteins

  4. digest fats by enzymes

Show answer
Correct Option: A
Explanation:
The main function of bile juice is the absorption of fats, fat-soluble substances such as vitamin A, D, E, & K.
So, the correct option is 'Emulsify fats for digestion'.

Which of the following digestive glands secretes a digestive juice which does not contain enzymes?

biology digestive system of human digestive glands liver pancreas

  1. Salivary

  2. Liver

  3. Pancreas

  4. None of these

Show answer
Correct Option: B
Explanation:

  • The liver performs a variety of functions such as synthesis, storage and secretion of various substances. The liver secretes bile juice.
  • The bile secreted by the hepatic cells is released into the duodenum contains bile pigments, bilirubin and biliverdin formed by the breakdown of haemoglobin of the old RBC destroyed in the body., bile salts such as glycocholates and taurocholate of sodium and potassium, cholesterol and phospholipids but no enzymes. 
  • The bile secreted is a yellowish-green fluid that helps in the emulsification of fats. Bile is not an enzyme, but it does contain bile salts that emulsify large fat droplets. Hence, the liver is the digestive glands secretes a digestive juice which does not contain enzymes.
So, the correct answer is 'liver'.

Which of the following is not a function of bile?

biology digestive system of human digestive glands liver pancreas

  1. Bile neutralises the acidic traces of food

  2. It provides an alkaline medium for the intestinal proteases

  3. It contains a lipase

  4. Its salts emulsify fats

Show answer
Correct Option: C
Explanation:

  1. Bile is a dark green to yellowish brown fluid, produced by the liver of most vertebrates, bile helps in the digestion of lipids in the small intestine. In humans, bile is produced continuously by the liver and stored and concentrated in the gallbladder.
  2. The composition of hepatic bile is water, bile salts, bilirubin, fats (cholesterol, fatty acids, and lecithin), and inorganic salts.
  3.  Lipase is an enzyme secreted by pancreas and lipase is present in pancreatic juice. Lipase helps your body digest fats. Hence, the bile does not contain lipase.
So, the correct answer is 'it contains a lipase'.