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

Enzyme ptyalin or salivary amylase present in the saliva gets activated by 

  1. Mastication of food

  2. Hydrolysis of food by saliva

  3. Starch present in the food

  4. Chloride ions present in saliva
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Chewing or mastication is the process by which food is crushed and ground my teeth. It is the first step of digestion, and it increases the surface area of foods to allow a more efficient break down by enzymes. So the correct option is 'Mastication of food '.

Multiple choice bio-chemistry digestive system of human digestive system- glands mouth and buccal cavity digestive glands

Salivary glands secrete

  1. Amylase

  2. Pepsin

  3. Trypsin

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

An amylase is an enzyme that catalyses the hydrolysis of starch into sugars. Amylase is present in the saliva of humans and some other mammals, where it begins the chemical process of digestion. Bile juice is secreted by liver. Pepsin and trypsin are produced in small intestine. 

Therefore, the correct answer is option A.

Multiple choice biology digestion and absorption digestive system- glands mouth and buccal cavity digestive glands

Arterioles provide ___ to liver.

  1. Oxygen

  2. Protein

  3. Energy

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

  • An arteriole is a small-diameter blood vessel in the microcirculation that extends and branches out from an artery and leads to capillaries.
  • The liver receives blood from two major blood vessels. The hepatic arterioles bring oxygen-rich blood from the heart.
  • The hepatic portal vein brings blood rich in digested nutrients from the intestine. This means excess nutrients can be removed and stored before blood circulates around the body. Hence Arterioles provides oxygen to the liver.
So, the correct answer is 'oxygen'.

Multiple choice bio-chemistry digestive system of human digestive system- glands mouth and buccal cavity digestive glands

A digestive enzyme, salivary amylase, in the saliva being digestion of 

  1. Protein

  2. Nucleic acids

  3. Fats

  4. Carbohydrates
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
  • First, salivary glands in your mouth make salivary amylase, which begins the digestive process by breaking down starch when you chew your food, converting it into maltose, a smaller carbohydrate. 
  • The breakdown of starch is just one of the many steps in the process of digestion. Although digestion begins in the mouth, it continues in the stomach and intestines.
  • Amylase is an enzyme that breaks down starch to sugar. The amylase in the mouth, salivary amylase, is called ptyalin. 
  • Ptyalin can do digestive can work in the stomach for several hours. Iodine and Benedict's solution is used to recognize starch and sugar (maltose) in our saliva.
Therefore, the correct answer is option D.
Multiple choice bio-chemistry digestive system of human digestive system- glands mouth and buccal cavity digestive glands

Enzymes of salivary glands, stomach and small intestine works at pH __, __ and ___ respectively.

  1. 6.8, 2, 8

  2. 8,2, 6.8

  3. 2,8,6.8

  4. 6.8, 8,2
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Salivary amylase works best at a slightly acidic pH of about 6.8, gastric enzymes (like pepsin) work in a highly acidic environment (pH 1-2), and intestinal enzymes work in an alkaline environment (pH 8).

Multiple choice bio-chemistry digestive system of human digestive system- glands mouth and buccal cavity digestive glands

Identify the correctly matched structure and its secretion

  1. Brunners glands Salivary amylase

  2. Intestinal mucosa Insulin

  3. Gall bladder Bile

  4. Salivary gland Lysozyme

  5. Goblet cells - HCl
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Salivary glands secrete saliva containing enzymes like salivary amylase and lysozyme, which provides antibacterial protection. Brunner's glands secrete alkaline mucus, not amylase.