Tag: digestion

Quizzes (15) Questions (200)

Questions Related to digestion

Multiple choice bio-chemistry digestion absorption of food absorption parts of the digestive system: structure and function

The gastrointestinal hormone, which stimulates insulin secretion is 

  1. Gastrin

  2. CCK

  3. Secretin

  4. GIP
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Gastric inhibitory polypeptide (GIP), also known as the glucose-dependent insulinotropic peptide. The function of GIP is to induce insulin secretion, which is stimulated primarily by hyper osmolarity of glucose in the duodenum.

Multiple choice bio-chemistry digestion absorption of food absorption parts of the digestive system: structure and function

Secretion of gastric juice is controlled by

  1. Gastrin

  2. Cholecystokinin

  3. Enterogastrone

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

As food enters the confined space of the stomach, it starts applying pressure to the stomach wall distending it a bit. This distention causes the stomach to release gastrin, which stimulates the gastric glands to secrete more gastric juice.

Multiple choice bio-chemistry digestion absorption of food absorption parts of the digestive system: structure and function

Secretin is gastrointestinal tract hormone that

  1. Acts on exocrine part of pancreas and stimulates the secretion of water and bicarbonate ions

  2. Acts on exocrine portion of pancreas and stimulates the cells to secrete glucagon

  3. Acts on gastric glands and stimulates secretion of HCl and Pepsinogen

  4. Stimulates secretion of gastric lipase from stomach
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Secretin is released by the duodenum in response to acidic chyme. It travels through the blood to the pancreas, where it stimulates the secretion of water and bicarbonate ions to neutralize the acid.

Multiple choice bio-chemistry digestion absorption of food absorption parts of the digestive system: structure and function

Choose the odd one w.r.t. locations of source cells for hormone.

  1. Gastrin

  2. Enterogastrone

  3. Secretin

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

The gastrin hormone is secreted by the pyloric stomach located adjacent to the duodenum. This hormone stimulates the gastric glands to release gastric juice and regulates the movement of the stomach. 

Secretin is produced by the small intestinal mucosa region. It may inhibit the gastrin secretion and stomach movement. Both enterogastrone and duocrinin hormones are released from duodenal mucosa. Enterogastrone regulates gastric contraction and inhibits production of gastric juice. Duocrinin stimulates the viscous mucosa secretion from Brunner's gland into the intestinal juice. 
So, the correct answer is option A, Gastrin.