Biology · Science General

Human Digestive System

2,002 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

Which of the following is the characteristic of strawberry gallbladder?

  1. Benign growth on the gallbladder wall

  2. Inflammation of the gallbladder

  3. Change in the gallbladder wall due to excess cholesterol

  4. Presence of stones in the gallbladder
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Strawberry gallbladder is a change in the gallbladder wall due to excess cholesterol. It is also called cholesterolosis.

Multiple choice

Which of the following is the correct order of steps in the process of nutrition?

  1. Ingestion - Digestion - Absorption - Egestion - Assimilation

  2. Ingestion - Assimilation - Absorption - Digestion - Egestion

  3. Ingestion - Digestion - Absorption - Assimilation - Egestion

  4. Ingestion - Digestion - Assimilation - Absorption - Egestion

  5. Ingestion - Egestion - Absorption - Assimilation - Digestion
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

This is the correct order. The food is first ingested through the mouth. It is then digested by breaking down in mouth cavity, stomach and small intestines. Then, the food is absorbed mainly by the small intestines. The absorbed food is then incorporated into the cell components in the process of assimilation. Lastly, the undigested food is excreted out in the process of egestion.

Multiple choice

Which of the following statements is/are false?

a. In amoeba, the food is digested by the enzymes secreted by the cell cytoplasm. b. Digestion takes place in hydra in the body cavity. c. Digestion in lower organisms is extracellular, whereas in higher organisms, it is interacellular.

  1. Only a

  2. Only a and b

  3. Only b

  4. Only b and c

  5. Only c
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

This is the correct option as this statement is false. Digestion in lower organisms is interacellular, whereas in higher organisms, it is extracellular.

Multiple choice

Which of the following is the correct order of food flow in the alimentary canal?

  1. Oesophagus - Stomach - Small intestines - Large intestines - Rectum

  2. Oesophagus - Stomach - Small intestines - Rectum - Large intestines

  3. Oesophagus - Stomach - Large intestines - Small intestines - Rectum

  4. Oesophagus - Small intestines - Stomach - Large intestines - Rectum

  5. Stomach - Oesophagus - Small intestines - Large intestines - Rectum
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This is the correct order of food flow in the alimentary canal. The masticated food from mouth reaches oesophagus from where it is pushed into the stomach. In stomach, the food is churned and converted into semi-solid paste which is then pushed into small intestines. In small intestines, the food is digested and absorbed. The undigested food is further passed into large intestines, where water is absorbed from the undigested food. The undigested waste is passed into rectum, where it is stored in semi-solid faeces.

Multiple choice

Match the following:

 
a. Ingestion 1. It is the process by which undigested food is removed by the body.
b. Digestion 2. It is the process of converting complex food substances into simpler, absorbable form.
c. Egestion 3. It is the process by which food is taken in by the organisms.

  1. a – 1, b – 2, c – 3

  2. a – 2, b – 3, c – 1

  3. a – 1, b – 3, c – 2

  4. a – 3, b – 1, c – 2

  5. a – 3, b – 2, c – 1
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

This is the correct option. Ingestion is the process by which food is taken in by the organisms. Digestion is the process of converting complex food substances into simpler, absorbable form. Egestion is the process by which undigested food is removed by the body.