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

What is the lymph vessel present in the villi of small intestine called?

  1. Lacteal

  2. Jejunum

  3. Cystic duct

  4. Bile duct

  5. Capillaries
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A lacteal is a lymphatic capillary that absorbs dietary fats bound to a carrier in the villi of the small intestine. This fat is then transported to the subclavian veins where it enters the bloodstream, and can be transported around the body.

Multiple choice

Which of the following statements is/are false?

a. Cardiac portion, fundic portion and pyloric portion are the three major parts of a human stomach. b. Oesophagus is a tube that extends posteriorly, passing through the neck, thorax and diaphragm. c. Vermiform appendix is a narrow, finger-like tubular projection that arises from the colon.

  1. Only a

  2. Only a and b

  3. Only b

  4. Only c

  5. Only b and c
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This is the correct option as this statement is false. Vermiform appendix is a narrow, finger-like tubular projection that arises from the caecum.

Multiple choice

The innermost layer lining the lumen is the mucosa. Which of the following statements regarding mucosa is/are false?

a. Mucosa layer forms irregular folds in the stomach. b. Mucosa layer forms finger-like foldings in the large intestine. c. Mucosa layer forms gastric glands in the stomach.

  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
C Correct answer
Explanation

This is the correct option as this statement regarding mucosa layer is false. Mucosa layer forms finger-like foldings called villi in the small intestine.

Multiple choice

Which of the following statements is/are false?

a. The ileo-caecal valve prevents the back flow of the faecal matter. b. Fructose, fatty acids, glycerol and amino acids are absorbed through the mucosa into the blood stream. c. The digestive enzyme lysozyme digests the starch and converts it into maltose.

  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 digestive enzyme salivary amylase digests the starch and converts it into maltose.

Multiple choice

Which of the following are a product of regulated secretion?

  1. Digestive proteases

  2. Antibodies

  3. Neurotransmitters

  4. Membrane proteins
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Neurotransmitters are released by the process of regulated secretion. The vesicles carrying neurotransmitters fuse with membrane and release their contents once an appropriate signal is received.