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

Mastication refers to

  1. digestion

  2. absorption

  3. assimilation

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

The correct option is (4).

Multiple choice biology organization of life

Choose the correct answer from the alternatives givens.
Which of the following body systems contribute to homeostasis?

  1. Digestive and excretory systems

  2. Respiratory and nervous systems

  3. Nervous and endocrine systems

  4. Immune and cardiovascular systems
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

  • Homeostasis is the tendency towards a relatively stable equilibrium between interdependent elements maintained by the physiological process.
  • In the body, some systems support  homeostasis, like the nervous and endocrine system
So, the correct answer is 'nervous and endocrine system'

Multiple choice

Food being digested in the stomach is what?

  1. Um yummy?

  2. Gross!

  3. Chemical Change

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

Digestion involves enzymes and acids breaking down food into different chemical components, which is a chemical change. Physical digestion, like chewing, is a physical change, but the overall process is primarily chemical.

Multiple choice biology coordination in life processes ingestion of food mechanism of digestion

Digestion is the breaking down of large food molecules into
smaller ones. The main purpose of this is to

  1. Make the food soluble

  2. Enable the digestive enzymes to be used up

  3. Provide many different types of molecules for absorption

  4. Make the Passage of food along the gut easier

  5. Make the food insoluble
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Most of our foods are complicated chemical structure.
In order to be absorbed and utilized by the body, they
must be broken down into relatively simple molecules.
The process by which the complex food materials are
changed to simple molecules is called digestion.

Multiple choice biology coordination in life processes ingestion of food mechanism of digestion

Food and air pathway are divided at

  1. Larynx

  2. Pharynx

  3. Oesophagus

  4. Stomach
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
The pharynx is part of the digestive system as well as the respiratory system because it carries both food and air. At the bottom of the pharynx, this pathway divides in two, one for food (the oesophagus, which leads to the stomach) and the other for air.
So, the correct option is 'Pharynx'.
Multiple choice biology coordination in life processes ingestion of food mechanism of digestion

The swallowing of food from buccopharyngeal cavity to stomach is called 

  1. Deglutition

  2. Mastication

  3. Peristalsis

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Deglutition is the medical term for the act of swallowing, which involves the movement of food from the mouth through the pharynx and esophagus to the stomach.

Multiple choice biology coordination in life processes ingestion of food mechanism of digestion

The secretion of brush border cells of intestinal mucosa along with secretion of goblet cells constitute

  1. Succus entericus

  2. Chyme

  3. Gastric juice

  4. Chylomicrons

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

Succus entericus is the collective term for the secretions of the intestinal glands (brush border cells) and goblet cells in the small intestine.

Multiple choice zoology nervous system of man pns divisions of nervous system peripheral nervous system

Meissners plexus and Auerbachs plexus of gastrointestinal tract occur respectively in

  1. Submucosa and mucosa

  2. Mucosa and muscularis externa

  3. Submucosa and muscularis externa

  4. Lamina propia and muscularis mucosa
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Meissner's plexus (submucosal plexus) is located in the submucosa layer of the gastrointestinal tract, while Auerbach's plexus (myenteric plexus) is located between the circular and longitudinal muscle layers of the muscularis externa.

Multiple choice bio-chemistry inborn errors of metabolism haemophilia and colour blindness non infectious diseases keeping diseases away

Mark the correct statement.

  1. In lower one third part of oesophagus both Myenteric and Meissner's plexus are absent

  2. Carboxypeptidase is exopeptidase acting on 'N' terminal end of peptide chain

  3. Galactosemia is metabolic genetic disorder due to deficiency of the enzyme uridyl transferase

  4. Nucleotidase and nucleosidase enzymes are present in pancreatic juice
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
  • Here, option (C) is correct as Galactosemia is metabolic genetic metabolic disorder due to deficiency of the enzyme uridyl transferase.
  • While, carboxypeptidase is a protease enzyme that acts on 'C' terminal end of a protien or peptide.
  • And, in pancreatic juice trypsin, amylase and lipase are present.
Multiple choice mitosis structure of chromosome, cell cycle and cell division cell division biology cell division in embryo development division for growth and reproduction

Glucose and amino acids are absorbed through the following part of villus.

  1. Epithelial cells

  2. Blood capillary

  3. Lymphatic vessel

  4. All
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Glucose and amino acids are absorbed through the epithelial cells (enterocytes) of the villi in the small intestine. From there, they pass into the blood capillaries.

Multiple choice mitosis structure of chromosome, cell cycle and cell division cell division biology cell division in embryo development division for growth and reproduction

The epithelial cells lining the stomach of vertebrates are protected from damage by HCl because.

  1. HCl is too dilute

  2. The epithelial cells are resistant to the action of HCl

  3. HCl is neutralized in the stomach

  4. The epithelial cells are covered by mucus
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
The epithelial cells lining the stomach of vertebrates are protected from damage by HCl because 'the epithelial cells are covered by a mucous secretion'.
So the correct option is D.
Multiple choice temperature control homeostasis coordination and response biology

Homeostasis is the process which regulates

  1. Formation of food

  2. External environment

  3. Metabolism regulation

  4. Internal environment
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Homeostasis is the ability of an open system to regulate its internal environment to maintain stable conditions by means of multiple dynamic equilibrium adjustments controlled by interrelated regulation mechanisms. All living organisms, whether unicellular or multicellular exhibit homeostasis. Therefore, the correct answer is option D.