Biology ยท Science General

Human Digestive System

1,953 Questions

The human digestive system explores the breakdown of biomacromolecules, covering organs from the stomach to the small intestine. It involves physiological processes like chyme movement, pH levels, and nutrient absorption in the gut. These fundamental biology concepts are regularly featured in medical and general science competitive exams.

Small intestine functionsBiomacromolecule breakdownStomach and digestionIntestinal bacteria

Human Digestive System Questions

Multiple choice

Concerning the control of gastric secretion in humans, which of the following statements is correct?

  1. Secretin, released by the duodenum stimulates gastric secretion in the stomach.

  2. Parietal cells of the gastric glands secrete gastric acid in response to hormonal stimulation.

  3. Acid and pepsinogen is released by the stomach during the intestinal phase of gastric secretion.

  4. Gastric secretion does not commence unless the bolus reaches the stomach of an individual.

  5. The most abundant epithelial cells are gastric acid secreting cells.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Parietal cells produce gastric acid, a strong acid, that helps to break down food. These cells produce gastric enzymes, such as pepsinogen and lipase which help us to digest.

Multiple choice

Mastication refers to

  1. digestion

  2. absorption

  3. assimilation

  4. chewing
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The correct option is (4).

Multiple choice

In which of the following cases is antacid consumed?

  1. When there is a burn.

  2. When there is vitamin deficiency.

  3. When a wound occurs.

  4. When a person experiences acidity in stomach.

  5. When blood clot.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

When a person experiences acidity in stomach, it is neutralised by antacid like magnesium hydroxide (milk of magnesia).

Multiple choice

Food being digested in the stomach is what?

  1. Um yummy?

  2. Gross!

  3. Chemical Change

  4. Physical Change
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Digestion involves enzymes and acids breaking down food into different chemical components, which is a chemical change. Physical digestion, like chewing, is a physical change, but the overall process is primarily chemical.

Multiple choice biology coordination in life processes ingestion of food mechanism of digestion

Digestion is the breaking down of large food molecules into
smaller ones. The main purpose of this is to

  1. Make the food soluble

  2. Enable the digestive enzymes to be used up

  3. Provide many different types of molecules for absorption

  4. Make the Passage of food along the gut easier

  5. Make the food insoluble
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Most of our foods are complicated chemical structure.
In order to be absorbed and utilized by the body, they
must be broken down into relatively simple molecules.
The process by which the complex food materials are
changed to simple molecules is called digestion.

Multiple choice biology coordination in life processes ingestion of food mechanism of digestion

Food and air pathway are divided at

  1. Larynx

  2. Pharynx

  3. Oesophagus

  4. Stomach
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
The pharynx is part of the digestive system as well as the respiratory system because it carries both food and air. At the bottom of the pharynx, this pathway divides in two, one for food (the oesophagus, which leads to the stomach) and the other for air.
So, the correct option is 'Pharynx'.