The serous membrane which covers the lungs is called
pericardium
peritoneum
perichondrium
pleura
D.
pleura
Lungs are the paired triangular bags constituting the respiratory organ. Each lung is enclosed in two membranes called pleura. There are two membrane that cover the lungs, i.e., visceral pleuron and parietal pleuron. Pleura also secrete the pleural fluid for reducing the friction on the surface of the lungs.
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
Match the following column I with column II
| Column I | Column II |
| A. Vitamin- B1 | 1. Accumulation of fat |
| B. Gastric juice | 2. Loss of fat |
| C. Starvation | 3. Pepsin |
| D. Obesity | 4. Beri- beri |
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
Which of the following organs does not produce any digestive enzymes?
Salivary gland
Pancreas
Liver
Stomach
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 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
