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

Which of the following can be inferred from the passage?

Directions: Read the passage given below and answer the question.

Bloating can be caused by a variety of factors like health issues, genetics, or medications; but it can also be caused by the foods we eat. Although we may be eating a healthy diet, some foods like broccoli and milk can cause painful gas and bloating that’s as uncomfortable as it is unsightly. Here is a list of six bloating culprits to watch out for.
Broccoli Although filled with fibre and vitamins, broccoli can also cause gas and bloating. Try eating broccoli very slowly to reduce gas.
Artificial sweeteners They may save on calories, but artificial sweeteners contain sugar alcohols which can cause bloating. Minimise your use of artificial sweeteners or skip them altogether to reduce uncomfortable gas.
Chewing gum While it may help to digest your food and keep your teeth white, chewing gum can bring excess air into your digestive system, which causes gas. Chew gum slowly to reduce gas.
Cabbage Delicious and healthy cabbage is a great vegetable to enjoy all year round. But this leafy veggie can also spur painful bloating. Avoid it or try eating it slowly for relief.
Carbonated drinks Although some popular sodas were created to help digestion, they may cause bloating as well. Limit your consumption of these bubbly treats to keep your digestive system on track.
Milk It may be filled with vitamins and nutrients, but milk is a major offender of bloating and gas. Try opting for lactose-free milk or almond milk for relief without sacrificing the milky taste.

  1. Condensed milk will not cause gas

  2. Pepsi will cause gas

  3. Tinned fruit juice will cause gas

  4. Chocolates will cause gas
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Pepsi will come under carbonated drinks, so this can be inferred.

Multiple choice

Peristaltic movement occurs in the

  1. stomach

  2. food pipe

  3. ileum

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

Peristaltic movement occurs in the oesophagus or food pipe. It involves rhythmic contraction of muscles, which pushes the food forward in the oesophagus. 

Multiple choice

Enterogastrone is

  1. hormone secreted by gastric mucosa

  2. enzyme secreted by mucosa

  3. hormone secreted by duodenal mucosa

  4. secreted by endocrine gland related to digestion.

  5. -
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

An enterogastrone is any hormone secreted by the mucosa of the duodenum in the lower gastrointestinal tract, in response to dietary lipids, that inhibits the caudal motion of the contents of chyme.

Multiple choice

Part of bile juice useful in digestion is

  1. bile salt

  2. bile pigment

  3. bile matrix

  4. None of the above

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

Bile acids are conjugated with taurine or glycine in the liver, forming bile salts. Primary bile acids are those synthesized by the liver. These help in the digestion of lipids.

Multiple choice

Digestion of proteins is completed in

  1. stomach

  2. duodenum

  3. ileum

  4. duodenum and ileum

  5. -
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Digestion of proteins begins in the stomach (in the acidic phase) and continues in the duodenum or small intestine (in the alkaline phase). The digestion is completed here by the pancreatic and intestinal enzymes.