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

The enzyme which hydrolyses triglycerides to fatty acids and glycerol is called

  1. pepsin.

  2. maltase.

  3. lipase.

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

A lipase is an enzyme that catalyses the hydrolysis of fats (lipids). Lipases are a subclass of the esterases. Lipases perform essential roles in the digestion, transport and processing of dietary lipids (e.g. triglycerides, fats, oils) in most, if not all, living organisms.

Multiple choice

Damage to the parietal cells of stomach leads to which of the following diseases?

  1. Menetrier's disease

  2. Zollinger-Ellison syndrome

  3. Fundic gland polyposis

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

Damage to parietal cells may lead to pernicious anemia. The damaged parietal cells fail to produce intrinsic factor which is required for vitamin B12 absorption. Deficiency of vitamin B12 causes pernicious anaemia.

Multiple choice

Where does the absorption of water and inorganic minerals occur in ruminants?

  1. Reticulum

  2. Abomasum

  3. Omasum

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

Absorption of water and inorganic mineral nutrients in ruminants occurs in the omasum part of the digestive tract. Omasum is the third compartment of the stomach of ruminants. The omasum wall is highly folded, giving a large surface area which allows for the efficient absorption of water and salts released from the partially digested food.