Digestive System | MCQs

Explanation

• Bile is produced by the liver and stored in the gallbladder.
• It is released into the small intestine to facilitate fat digestion and absorption.
• Bile breaks down fats into smaller particles, making it easier for enzymes to digest them.

Explanation

• The liver produces bile, which is a digestive fluid that helps break down fats and absorbs fat-soluble vitamins.
• The liver produces about 1 liter of bile daily, which is then stored in the gallbladder and released into the small intestine through the bile duct.

Explanation

• The oesophagus is a muscular tube that connects the pharynx (throat) to the stomach.
• Its main function is to transport food from the pharynx to the stomach through peristalsis (wave-like muscle contractions).

Explanation

Small intestine is the primary site for nutrient absorption into the bloodstream.

It contains villi and microvilli, which increase the surface area for efficient absorption of digested food.

Explanation

Bile juice is produced by the liver.

It is stored in the gall bladder.

From the gall bladder, it is released into the small intestine.

Bile juice aids digestion.

Explanation

• Bile salts are produced by the liver and stored in the gallbladder.
• They are released into the duodenum (the first part of the small intestine) to facilitate fat digestion.

Explanation

The pharynx (throat) is a shared passage for both the respiratory and digestive systems.

The trachea (windpipe) and esophagus both connect to the pharynx:

• The trachea connects to the pharynx anteriorly (front) and leads to the lungs.
• The esophagus connects to the pharynx posteriorly (back) and leads to the stomach.

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 cow have four stomachs, the first of which is the rumen.

When a cow takes a bite of grass, it chews it briefly, mixing it with a large amount of saliva.

The grass then passes to the rumen, which is a large pouch.

The rumen does not produce digestive juices.