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 chemistry medicinal chemistry antacids and antihistamines therapeutic action of different classes of drugs ph regulation of the stomach

The main cause of acidity in the stomach is :

  1. release of extra gastric acids which decrease the pH level

  2. indigestion and pain in large intestine

  3. increase the pH level in stomach

  4. release of extra bile juice which increases alkaline medium in stomach
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

An antacid is a substance which neutralises stomach acidity and is used to relieve heartburn, indigestion or an upset stomach.

Antacids contain alkaline ions that chemically neutralise stomach gastric acid, reducing damage and relieving pain.
Gastric acid is a digestive fluid formed in the stomach and is composed of hydrochloric acid ($HCl$), potassium chloride ($KCl$) and sodium chloride ($NaCl$). If gastric acid is released in the stomach the Ph level decreases and thereby increasing acidity in the stomach.

Multiple choice chemistry medicinal chemistry antacids and antihistamines therapeutic action of different classes of drugs ph regulation of the stomach

________ work by counteracting (neutralising) the acid in your stomach. 

  1. Disinfectants

  2. Antibiotics

  3. Antacids

  4. Anti-depressants
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Antacids neutralize the acid made by your stomach, curing various problems like heartburn, upset stomach, etc. Generally, they do not have any side effects.

Multiple choice evs excretion in living organisms other systems in the body excretory system in human human excretory organs

The process of expelling waste from the organism is called

  1. Digestion

  2. Ingestion

  3. Excretion

  4. Reflex action
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
  • The process of expelling waste from the organism is called excretion. Ammonia, urea and uric acid are the major forms of nitrogenous wastes excreted by the animals. Ammonia is the most toxic form and requires a large amount of water for its elimination, whereas uric acid, being the least toxic, can be removed with a minimum loss of water.
  • The human excretory system consists of a pair of kidneys, ureter, urinary bladder and urethra.
  • So, the correct answer is 'Excretion'.
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 .