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 bio-chemistry the muscular system and digestive system in human beings busy at work - our internal organs skeletal and digestive system from tasting to digestion types of ecological pyramids introduction to human digestive system

The enzyme that is not present in succus entericus is

  1. Maltase

  2. Nucleases

  3. Nucleosidase

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

Succus entericus (intestinal juice) contains disaccharidases, dipeptidases, and lipases, but nucleases are primarily secreted by the pancreas.

Multiple choice bio-chemistry the muscular system and digestive system in human beings busy at work - our internal organs skeletal and digestive system from tasting to digestion types of ecological pyramids introduction to human digestive system

Cellulose in our food passes out undigested.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Cellulose falls into the category of indigestible carbohydrates known as dietary fibre. Humans don't have an enzyme to digest cellulose. 

Hence, the correct answer is 'true'

Multiple choice bio-chemistry the muscular system and digestive system in human beings busy at work - our internal organs skeletal and digestive system from tasting to digestion types of ecological pyramids introduction to human digestive system

Digestion of food occurs as a result of

  1. hydrolysis

  2. oxidation

  3. polymerization

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

  • The digestion process depends upon hydrolysis to provide the biochemical reactions that break down food.
  •  The digestive tract secretes enzymes, such as proteases, carbohydrases, nucleases and lipases that, along with water, catalyze the hydrolysis that releases various nutrients. Hence, the Digestion of food occurs as a result of hydrolysis.
So, the correct answer is 'hydrolysis'.

Multiple choice bio-chemistry the muscular system and digestive system in human beings busy at work - our internal organs skeletal and digestive system from tasting to digestion types of ecological pyramids introduction to human digestive system

Choose the correct answers from the alternatives given.
Most chemical digestion occurs in the

  1. stomach

  2. liver

  3. duodenum

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

Enteropeptidase is an enzyme produced by the cells of the duodenum and is involved in the digestion in humans and other animals. Enteropeptidase converts trypsinogen (a zymogen) into its active form trypsin, resulting in the subsequent activation of pancreatic digestive enzymes

So, the correct answer is 'duodenum'

Multiple choice bio-chemistry the muscular system and digestive system in human beings busy at work - our internal organs skeletal and digestive system from tasting to digestion types of ecological pyramids introduction to human digestive system

Most digestive systems have regions for.......... food

  1. transporting

  2. processing

  3. storing

  4. all of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The digestive system plays an important role in the absorption of nutrients into the body. It takes the food we ingest, breaks it down mechanically and chemically in the mouth and stomach. It then absorbs nutrients, fats, proteins, and water in the intestines before eliminating the waste through the rectum

So, the correct answer is 'all of these'

Multiple choice bio-chemistry the muscular system and digestive system in human beings busy at work - our internal organs skeletal and digestive system from tasting to digestion types of ecological pyramids introduction to human digestive system

Which of the following is not produced in the stomach?

  1. Sodium hydrogencarbonate

  2. Gastrin

  3. Hydrochloric acid

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

  1. The stomach produces gastrin, hydrochloric acid and pepsinogen.
  2. G-cells in the stomach releases gastrin in response to distension of the antrum. This, in turn, causes an increase in the secretion of HCl from the parietal cells or oxyntic cells, which kills or inhibits bacteria and provides the acidic pH for the proteases to work and pepsinogen is released from chief cells in the stomach called zymogenic cells or peptic cells. 
  3. Pepsinogen, inactive form of the enzyme in presence of hydrochloric acid activates into the active form, pepsin. Pepsin breaks down proteins into polypeptides. Hence, sodium hydrogen carbonate is not produced in the stomach.
So, the correct answer is 'sodium hydrogen carbonate'.

Multiple choice bio-chemistry the muscular system and digestive system in human beings busy at work - our internal organs skeletal and digestive system from tasting to digestion types of ecological pyramids introduction to human digestive system

Disorders of digestive system
In which of the following order, the process of digestion proceeds? 

  1. Digestion $\rightarrow$ Ingestion $\rightarrow$ Absorption $\rightarrow$

    Assimilation $\rightarrow$ Egestion
  2. Digestion $\rightarrow$ Ingestion $\rightarrow$ Assimilation $\rightarrow$ Absorption $\rightarrow$ Egestion
  3. Ingestion $\rightarrow$ Digestion $\rightarrow$ Assirhilation $\rightarrow$ Absorption $\rightarrow$ Egestion
  4. Ingestion $\rightarrow$ Digestion $\rightarrow$ Absorption $\rightarrow$ Assimilation $\rightarrow$ Egestion
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The correct sequence of nutrition is Ingestion (taking in food), Digestion (breaking it down), Absorption (taking nutrients into the blood), Assimilation (using nutrients), and Egestion (removing waste).

Multiple choice bio-chemistry the muscular system and digestive system in human beings busy at work - our internal organs skeletal and digestive system from tasting to digestion types of ecological pyramids introduction to human digestive system

Which of these is a part of your digestive system? 

  1. Stomach

  2. Pancreas

  3. Rectum

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

All of these choices are a part of your digestive system. Your digestive system has many other associated organs including the small intestine, large intestine, and liver. The stomach is an area of food digestion. The pancreas releases hormones that affect the digestive process. The rectum is the last place you store you food before the process of elimination (pooping).

Multiple choice evs - i the muscular system and digestive system in human beings busy at work - our internal organs skeletal and digestive system from tasting to digestion

Intake of food is called

  1. Ingestion

  2. Egestion

  3. Digestion

  4. Nutrition
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • Ingestion is the consumption of a substance by an organism.
  • This is accomplished by taking in the substance through the mouth into the gastrointestinal tract, such as through eating or drinking.
    Hence, the correct answer is A.
Multiple choice bio-chemistry cell membrane regulation of respiration transport of respiratory gases buffer and its role

Steps of respiration are controlled by

  1. Substrates

  2. Enzymes

  3. Hormone

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

  •  Cellular respiration is the process by which cells convert glucose into carbon dioxide and water. 
  • Cellular respiration takes place in three steps: glycolysis, the citric acid cycle and oxidative phosphorylation.
  • The main role of enzymes during the respiration reaction is to assist in transferring electrons from one molecule to another. e.g. In glycolysis, the enzyme dehydrogenase is used. Hence, the steps of respiration are controlled by enzymes.
So, the correct answer is  'enzymes'.

Multiple choice zoology allergy immunity related disorders and problems antibody production and vaccination biotechnology

During inflammation,which of the following is secreted by connective tissue?

  1. Serotonin

  2. Heparin

  3. Glucagon

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

Histamine is an organic nitrogenous compound involved in the inflammatory response and has a central role as a mediator of itching. Histamine is produced by basophils and by mast cells found in nearby connective tissues. Histamine is stored in cytoplasmic granules along with other amines and rapidly released upon triggering with a variety of stimuli. It causes the contraction of smooth muscle, dilation of blood vessels etc..

So, the correct answer is 'Histamine'.

Multiple choice bio-chemistry respiration in organisms glucose metabolism the need for energy in living organism respiratory function

The receptors for opioids are present in?

  1. Gastrointestinal tract

  2. CNS

  3. Circulatory and respiratory systems
  4. Both $(1)$ & $(2)$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Opioids are a type of drug. They are also referred to as narcotics. In the human body, the opioid receptors are present at a variety of locations, including the brain, in the spinal cord, on peripheral neurons, and the digestive tract. They often act as pain relievers.

So, the correct answer is 'Both (1) & (2)'.
(1& (2)'.

Multiple choice bio-chemistry our health disease and its treatment manifestation and treatment of disease treatment of disease

The larva of Ascaris undergoes the migration in which of the
following course

  1. Alimentary canal, liver, intestine

  2. Alimentary canal, heart, lungs, trachea, intestine

  3. Alimentary canal, heart, liver, lungs, trachea, mouth,

    intestine

  4. Alimentary canal, liver, heart, lungs, trachea, pharynx,

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

Embryonated eggs$\rightarrow $  Mouth $\rightarrow $ Intestine$\rightarrow $  Liver$\rightarrow $ 
($2^{nd}$ stage larva )
Heart $\rightarrow $ Lungs $\rightarrow $ trachea $\rightarrow $ Phyarynx $\rightarrow $ Intestine 
($4^{th}$ stage larva )







Multiple choice biology structure and functions of living organisms -ii dental care, eye care and hair care dental care and dental diseases salivary glands

The saliva secreted by salivary glands not  

  1. Contain electrolytes like $Na^+,K^+, CI^-$ and $3 HCO _3^+$

  2. Give safely against dental carries
  3. Bring about hydrolysis of starch upto $90\%$

  4. Initiate the process of digestion
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
  • Saliva secreted by salivary glands doesn't give safety against dental caries.
  • Dental carries take place due to deposition of food particles on teeth and subsequent bacterial decay.
  • So, the correct option is 'Give safely against dental carries'.