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Digestion and Absorption

Multiple Choice Questions

71.

What is the correct sequence of thickness of muscles layers in the stomach of human beings

Circular➔Oblique➔Longitudinal
Oblique➔Longituinal➔Circular
Longitudinal➔ Circular➔ Oblique
None of the above

72.
Which of the following hormone helps in secretion of HCl from stomach?

Renin

Gastrin

Secretin

Somatomedin

Gastrin

Gastrin hormone is secreted by gastrin cells in the pyloric region of stomach. It stimulates gastric glands to secrete and release the gastric juice, which contains HCl and proenzyme pepsinogen and prorennin.

Renin is a central hormone in the control of blood pressure and various other physiological functions. It is a proteolytic enzyme that is synthesized by chief cells of stomach. It helps in coagulation of milk.

Secretin is a hormone released into the bloodstream by the duodenum to stimulate secretion by the liver and pancreas. It is released in response to acid in the small intestine. It also stimulates the pancreas and bile duct to release a flood of bicarbonate base.

Somatomedin is a hormone which acts as an intermediate in the stimulation of tissue growth by growth hormone.