Question

The mucosal layer in the stomach form irregular folds known as
A. Villi
B. Lumen
C. Rugae
D. Crypts of Lieberkühn
E. Lacteals

Answer 1

Hint: A stomach is a T- shaped organ that stores food material temporarily, it is also associated with mixing of enzymes with food and the process of digestion.

Complete answer:
- The mucosal layer in the stomach forms irregular folds known as the rugae. Rugae is the simplified name of mucosal rugae stomach is a T-shaped organ associated with the process of digestion. The breakdown of complex food material into simpler forms is called digestion. Stomach can be divided into three parts-cardiac, fundus and pyloric.
- Cardiae-cardiae is the first part of the stomach that has sphincter muscles in its structure. The sphincter muscles undergo peristaltic movement to pass the food from oesophagus to stomach and prevent backflow of food. Fundus-fundi part lies just below the diaphragm on the left side of the cardiae. It is rounded in shape.
- Pylorus is the last part of the stomach that acts as a connection between the stomach and the small intestine. Antrum is a part of the pyloric stomach that holds the food material that has to be tended to by the small intestine. Antrum is called as pyloric lumen.
- Villi are the finger- like projections present in the small intestine that increase the surface area for absorption. The crypts of Lieberkühn are the tubular glands that occur throughout the small intestine between villi and mucus. The series of ridges that are formed by the folding of the organ wall is called rugae. Rugae are also called gastric folds that function in increasing the surface area for absorption of more minerals.

Hence the correct answer is option (C) Rugae.

Note: The various functions of stomach are,
A. It acts a temporary storage organ for food (food is stored for 2 hours)
B. It has a role in gastrointestinal motility
C. It secretes acids and enzymes for breakdown of food