Biology · 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 biology hygiene - a key to healthy life mosquitoes and malaria diseases caused by mosquitoes contaminated water spreads disease

Housefly cannot take food unless it is in

  1. Digested state

  2. Liquid state

  3. Semisolid state

  4. Solid state
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Once a housefly sniffs something interesting and tastes it with its feet and palps, the time has come to gobble up the delicious morsel. If the meal in question happens to be liquid already, then the task is easy. Since the housefly's mouth parts are designed to sponge and ingest liquefied food, it's just a matter of turning on the suction. The food goes straight into the fly's stomach. Solid food is slightly more difficult. Houseflies can't bite or chew -- they simply don't have the proper equipment.

So, the correct answer is 'Liquid state'.
Multiple choice bio-chemistry digestive system of human role of intestine digestion in intestine digestive system - organs

Finger like projections present in large intestine are called _____

  1. Jejunum

  2. Colon

  3. Villi

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

Digestion ends in small intestine. Waste products are excreted from our body through large intestine. Excess water and salts are absorbed from intestine through muscular finger like projections called Villi.

Multiple choice bio-chemistry digestive system of human role of intestine digestion in intestine digestive system - organs

Which of the following controls the Peristaltic movement of
the intestine

  1. Sacral Plexus

  2. Brachia! Plexus

  3. Discoidal Plexus

  4. Auerbach's Plexus
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Auerbach 's  plexus is part of autonomic nervous system  in vertebrates lying between the two main muscular layers  of intestine and controlling its peristaltic movements .

Multiple choice bio-chemistry digestive system of human role of intestine digestion in intestine digestive system - organs

Caecum is large for digestion of cellulose with the help of symbiotic bacteria in

  1. Man

  2. Rabbit

  3. Cat

  4. Frog
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Rabbits are hindgut fermenters that rely on a large, specialized caecum to house symbiotic bacteria for the breakdown of cellulose. Humans, cats, and frogs do not utilize the caecum for this purpose.

Multiple choice bio-chemistry digestive system of human role of intestine digestion in intestine digestive system - organs

Part of alimentary canal meant for reabsorption of water from chyle is

  1. Small intestine

  2. Colon

  3. Large intestine

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

The large intestine, specifically the colon, is the primary site for the reabsorption of water and electrolytes from the remaining chyle. This process helps in the formation of solid faeces.

Multiple choice bio-chemistry digestive system of human role of intestine digestion in intestine digestive system - organs

Some symbiotic microorganisms occur in human body in

  1. Vermiform appendix and rectum

  2. Caecum

  3. Duodenum

  4. Oral lining and tongue surface
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The human caecum houses a population of symbiotic microorganisms that contribute to gut health. While the human caecum is reduced compared to herbivores, it still serves as a reservoir for these bacteria.

Multiple choice bio-chemistry digestive system of human role of intestine digestion in intestine digestive system - organs

Back flow of faecal matter from large intestine is prevented by

  1. Epiglottis

  2. Sphincter of Oddi

  3. Ileocaecal valve

  4. Gastro-oesophageal sphincter
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The ileocaecal valve is a sphincter muscle located at the junction of the small intestine (ileum) and the large intestine (caecum). It prevents the backflow of faecal material into the small intestine.