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 softskills leadership

sever

  1. chaperon

  2. abyss

  3. abdominal

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

Sever means to cut off completely or divide by cutting, often separating something into parts. Separate (D) is the closest in meaning as it also means to set apart or divide things. The other options are unrelated to the concept of cutting or dividing.

Multiple choice

The most critical physiological factor controlling hunger is the

  1. level of blood sugar

  2. presence of stomach contractions

  3. taste of food

  4. presence of weakness or fatigue
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Blood sugar (glucose) level is the most critical hunger signal according to the glucostatic theory - when glucose drops, hunger increases. Stomach contractions (hunger pangs) are a symptom, not the control mechanism. Taste and weakness/fatigue can influence eating but are secondary to glucose levels. The brain monitors glucose via receptors and triggers hunger when levels fall.

Multiple choice

Which of the following statements is/are false?

a. Energy is needed by living as well as non-living things to work. b. The digested food is absorbed by the walls of intestine and carried by blood to different parts of the body. c. The lungs get rid of the nitrogen gas as one breathes out.

  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. The lungs get rid of the carbon dioxide gas as one breathes out.

Multiple choice

Lack of bowel control in children is known as

  1. enuresis

  2. analism

  3. encopresis

  4. anorexia nervosa
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Encopresis is the medical term for involuntary bowel movements or lack of bowel control, usually beyond the normal age for toilet training. Enuresis refers to bedwetting (urinary incontinence). The other options are not relevant terms for bowel control - analism is not a recognized term, and anorexia nervosa is an eating disorder.

Multiple choice

What does the term 'egestion' mean?

  1. Eating food

  2. Swallowing food

  3. Digesting food

  4. Faeces being removed through anus

  5. Nutrients being absorbed through villi
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Faeces being removed through anus is egestion.

Multiple choice

Pepsin is a protein-digesting enzyme in our stomach. But this enzyme is mostly secreted as a pro-enzyme called pepsinogen. Why is it secreted in this inactive form?

  1. Active pepsin will digest the wall of stomach in the absence of food.

  2. Active pepsin gets inactivated fast.

  3. Hydrochloric acid in stomach will destroy pepsin.

  4. Active pepsin will break down fats in food.

  5. Inactive pepsinogen gives time for food to reach the stomach by peristalsis.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Active pepsin will digest the wall of the stomach in the absence of food as pepsin is a protein digesting enzyme.