Biology ยท 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
  1. connective tissue

  2. nerve tissue

  3. epithelial tissue

  4. muscle tissue

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

It is the simplest tissue and is the protective tissue of the body. The cells of the tissue are tightly packed and it forms a continuous sheet. It covers most of the organs and cavities within the body. It also forms a barrier to keep different body systems separate. The skin and lining of the buccal cavity, blood vessels, alveoli and kidney tubules are made of epithelial tissue. It helps in absorption of water and nutrients

Multiple choice
  1. muscle tissue

  2. epithelial tissue

  3. connective tissue

  4. nerve tissue

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The muscle tissue form the contractile tissue are made of muscle cells. Movement of body or limbs are brought about by contraction and the relaxation of the contractile proteins which are present in the muscle cells The movement of the internal organs such as heart and alimentary canal, are all caused by muscle tissues

Multiple choice
  1. acids

  2. alkali

  3. enzymes

  4. vitamins

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Digestion is a biochemical process where complex food molecules are broken down into simpler absorbable forms by the action of enzymes.

Multiple choice
  1. Liver

  2. Thyroid

  3. Pancreas

  4. Stomach

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Trypsin is a digestive enzyme secreted by the pancreas in an inactive form (trypsinogen) and activated in the small intestine to break down proteins.

Multiple choice
  1. Enterokinase

  2. Streptokinase

  3. Urease

  4. Fibrinolysins

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Streptokinase is used to dissolve blood clots that have formed in the blood vessels. Streptokinase belongs to a group of medications known as fibrinolytics, and complexes of streptokinase with human plasminogen can hydrolytically activate other unbound plasminogen by activating through bond cleavage to produce plasmin.

Multiple choice
  1. protein

  2. CHO

  3. fats

  4. ether

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Proteins are complex molecules composed of long chains of amino acids. During digestion, enzymes break these chains down into individual amino acids for absorption.

Multiple choice
  1. Glucose

  2. Amino Acids

  3. Fatty acids

  4. Alumina acids

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Digestion breaks down food into glucose (from carbohydrates), amino acids (from proteins), fatty acids and glycerol (from fats). 'Alumina acids' is not a recognized biological term or digestion product - it appears to be a made-up or misspelled term.

Multiple choice
  1. Testosterone

  2. Pepsine

  3. Insuline

  4. Estrogen

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The pancreas secretes insulin, which regulates blood sugar levels, and glucagon. Testosterone is produced by testes, pepsin is a digestive enzyme from stomach, and estrogen is from ovaries. Note: 'Insuline' should be spelled 'Insulin' and 'harmone' should be 'hormone'.

Multiple choice
  1. hydrochloric acid

  2. ptylan

  3. mucin

  4. pepsin

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Mucin is the mucus secretion that lubricates food in the alimentary canal, helping it move smoothly. Hydrochloric acid digests food, ptyalin (salivary amylase) digests starch, and pepsin digests proteins.

Multiple choice
  1. Peptidases

  2. Disaccharidases

  3. Amylases

  4. Both (1) and (2)

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The epithelial cells of intestinal mucosa manufacture and secrete disaccharidases and peptidases. These enzymes are not released into the lumen of intestine but remain closely associated with the microvilli of the epithelial cells.