Stomach | MCQs

Explanation

HCl creates an acidic environment (pH 1.5 to 3.5) that activates the enzyme pepsin from its inactive form, pepsinogen.

Pepsin then breaks down proteins into smaller peptides, facilitating digestion.

Explanation

• Most of our nutrient absorption takes place in the small intestine.
• Where specialized enzymes and absorptive cells (enterocytes) break down.
• It absorb nutrients from food into the bloodstream.

Explanation

The stomach is a J shaped sac about one foot in length that lies under the diaphragm on the left of the abdominal cavity.

The stomach has three parts:

1. The region where the stomach opens is known as the cardiac stomach.
2. The main body is known as fundus.
3. The posterior portion which opens to the intestine is known as the pyloric stomach.

Explanation

• The stomach secretes stomach juices, also known as gastric juices, which contain digestive enzymes and acids that break down proteins, carbohydrates, and fats into smaller molecules.
• These juices help to digest food in the stomach.

Explanation

• The stomach mixes food with digestive enzymes and acids.
• It churning and blending it into a liquid mixture called chyme.
• Much like a mixer combines ingredients together.

Explanation

• Storage: Holds food temporarily
• Mechanical and chemical breakdown: Mixes and digests food with enzymes and acids
• Liquification: Converts food into a liquid mixture (chyme)
• Emptying: Releases chyme into the small intestine for nutrient absorption