Biology · Science General

Human Digestive System

1,953 Questions

The human digestive system explores the breakdown of biomacromolecules, covering organs from the stomach to the small intestine. It involves physiological processes like chyme movement, pH levels, and nutrient absorption in the gut. These fundamental biology concepts are regularly featured in medical and general science competitive exams.

Small intestine functionsBiomacromolecule breakdownStomach and digestionIntestinal bacteria

Human Digestive System Questions

Multiple choice zoology endocrine system and chemical co-ordination gastrointestinal tract and liver hormones of heart, kidney, liver and gastrointestinal tract coordination in human beings- chemical control

Gastro-intestinal hormone that stimulates insulin secretion is

  1. Gastrin

  2. Secretin

  3. GIP

  4. CCK
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

GIP (Gastric Inhibitory Peptide or Glucose-dependent Insulinotropic Polypeptide) stimulates insulin secretion in response to glucose.

Multiple choice zoology endocrine system and chemical co-ordination gastrointestinal tract and liver hormones of heart, kidney, liver and gastrointestinal tract coordination in human beings- chemical control

Secretion of hormone cholecystokinin is for 

  1. Controlling blood pressure

  2. Inducing peristalsis

  3. Bile functions

  4. Release of insulin
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Cholecystokinin (CCK) stimulates the contraction of the gallbladder to release bile into the duodenum.

Multiple choice zoology endocrine system and chemical co-ordination gastrointestinal tract and liver hormones of heart, kidney, liver and gastrointestinal tract coordination in human beings- chemical control

Secretion of gastric juice is stopped by

  1. Gastrin

  2. Secretin

  3. Enterogastrone

  4. Cholecystokinin
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
A. Gastrin is secreted in stomach by the parietal cells and stimulates the secretion of gastric juices from the gastric glands.
B. Secretin is secreted in duodenum and stimulates the secretion of pancreatic juice but inhibits the secretion of gastric juices.
C. Enterogastrone is secreted from the duodenal mucosa and decreases the secretion of gastric juices.
D. Cholecystokinin is secreted from the duodenum and causes contraction of gall bladder and secretion of pancreatic juice into duodenum.
So, the correct answer is 'Enterogastrone'.
Multiple choice zoology endocrine system and chemical co-ordination gastrointestinal tract and liver hormones of heart, kidney, liver and gastrointestinal tract coordination in human beings- chemical control

Which hormone stimulates the gastric glands to release the gastric secretion? 

  1. Enterogastrone

  2. Gastrin

  3. Pancreozymin

  4. Cholecystokinin
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
A. Enterogastrone is secreted from the duodenal mucosa and decreases the secretion of gastric juices.
B. Gastrin is secreted in stomach by the parietal cells and stimulates the secretion of gastric juices from the gastric glands.
C. Pancreozymin is the former name of cholecystokinin hormone that stimulates the contraction of gall bladder and release of pancreatic juices into duodenum.
D. Cholecystokinin is secreted from the duodenum and causes contraction of gall bladder and secretion of pancreatic juice into duodenum.
So, the correct answer is 'Gastrin'.
Multiple choice zoology endocrine system and chemical co-ordination gastrointestinal tract and liver hormones of heart, kidney, liver and gastrointestinal tract coordination in human beings- chemical control

Hormone involved in discharge of pancreatic secretions is

  1. Gastrin

  2. Cholecystokinin

  3. Secretin

  4. Both B and C
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
A. Gastrin is secreted in stomach by the parietal cells and stimulates the secretion of gastric juices from the gastric glands.
B. Cholecystokinin is secreted from the duodenum and causes contraction of gall bladder and secretion of pancreatic juice into duodenum.
C. Secretin is secreted in duodenum and stimulates the secretion of pancreatic juice but inhibits the secretion of gastric juices.
Hence, both cholecystokinin and secretin are involved in discharge of pancreatic secretions. So both options B and C are correct. 
So, the correct answer is 'Both B and C'.
Multiple choice zoology endocrine system and chemical co-ordination gastrointestinal tract and liver hormones of heart, kidney, liver and gastrointestinal tract coordination in human beings- chemical control

Enteroendocrine glands are present in 

  1. Stomach

  2. Intestine

  3. Oesophagus

  4. Both A and B
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Enteroendocrine glands are the endocrine glands present in gastrointestinal tract. Endocrine glands secrete their products directly into the blood stream. For example, cholecystokinin is secreted from duodenum (part of small intestine) and stimulates the contraction of gall bladder to release bile juice and also stimulates secretion of pancreatic juice. An example of hormone secreted from enteroendocrine gland in stomach is gastrin which stimulates secretion of gastric juice.
Hence, both options A and B are correct.
So, the correct answer is 'Both A and B'.
Multiple choice zoology endocrine system and chemical co-ordination gastrointestinal tract and liver hormones of heart, kidney, liver and gastrointestinal tract coordination in human beings- chemical control

Cholecystokinin and secretin are secreted by

  1. Stomach

  2. Liver

  3. Duodenum

  4. Ileum
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

  • Cholecystokinin is secreted from the duodenum and causes contraction of gall bladder and secretion of pancreatic juice into duodenum.
  • Secretin is secreted from duodenum and stimulates the secretion of pancreatic juice but inhibits the secretion of gastric juices.
So, the correct answer is 'Duodenum'.

Multiple choice zoology endocrine system and chemical co-ordination gastrointestinal tract and liver hormones of heart, kidney, liver and gastrointestinal tract coordination in human beings- chemical control

The hormone secretin is produced by 

  1. Pancreas and influences the conversion of glycogen to glucose

  2. Adrenal gland and accelerates heart beat

  3. Testis and produces male secondary sex characters

  4. Small intestine and stimulates pancreas
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
A. Insulin is secreted from the pancreas and influences the conversion of glycogen to glucose.
B. Adrenaline is secreted from the adrenal gland and accelerates the heart beat.
C. Testosterone is secreted from testis and produces male secondary sex characters.
D. Secretin is secreted by the duodenum i.e. small intestine and stimulates the secretion of pancreatic juice.
So, the correct answer is 'Small intestine and stimulates pancreas'.
Multiple choice zoology endocrine system and chemical co-ordination gastrointestinal tract and liver hormones of heart, kidney, liver and gastrointestinal tract coordination in human beings- chemical control

Pancreatic enzyme and bicarbonate secretion is stimulated by 

  1. Gastrin

  2. Cholecystokin

  3. Duocrinin

  4. Enterogastrone
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
A. Gastrin is secreted from stomach and stimulates the secretion of gastric juices.
B. Cholecystokinin is secreted by from duodenum and stimulates secretion of pancreatic juice.
C. Duocrinin is secreted from intestine and stimulates the secretion of intestinal fluid.
D. Enterogastrone is secreted from duodenum and inhibits the secretion of gastric juice.
So, the correct answer is 'Cholecystokin'.