Digestion and Absorption

Meissner's corpuscles occur in

• brain

• nerve cells

• skin

• tongue

Ptyalin is inactivated by a component of gastric juice known as

• pepsin

• mucus

• renin

• HCl

Cholecystokinin stimulates the secretion of

• bile

• gastric juice

• pancreatic juice

• succus entericus

Brunner's gland is present in

• duodenum

• jejunum

• ileum

• rectum

Select the correct match of the digested products in humans given in column I with their absorption site and mechanism in column II.

• Column I	Column II
  Glycine and glucose	Small intestine and active absorption

• Fructose and Na+

  Small intestine passive absorption

• Glycerol and fatty acids

  Duodenum and move as chilomicrons

• Cholesterol and maltose

  Large intestine and active absorption

The serous membrane which covers the lungs is called

• pericardium

• peritoneum

• perichondrium

• pleura

Which of the following organs does not produce any digestive enzymes?

• Salivary gland

• Pancreas

• Liver

• Stomach

Match the following column I with column II

• A- 3; B- 4; C- 2; D- 1

• A- 3; B- 4; C- 1; D- 2

• A- 4; B- 3; C- 1; D- 2

• A- 4; B- 2; C- 1; D- 3

The usual cause (s) of peptic ulceration is/are

• lower rate of secretion of gastric juice

• higher rate of secretion of gastric and duodenal juices

• improper neutralisation of gastric juice by duodenal juices

• imbalance between the rate of secretion of gastric juice and the degree of protection offered by gastro-duodenal mucosa

Intrinsic factor produced by the oxyntic cells of human gut wall is essential for

• converting the inactive pepsinogen to its active form pepsin

• maintaining an extremely acid environment in the stomach

• protecting the stomach wall and glands from autolysis (self-digestion)

• absorption of vitamin B₁₂ from the dietary supply