Which function of the liver helps in the formation of blood clots?
Correct answer A. Synthesis of plasma proteins such as fibrinogen and prothrombin
Topic / 45 questions
Digestion MCQs
Digestion MCQs are multiple-choice questions on the human digestive system, covering each part of the gut, the digestive glands and their enzymes, absorption and common digestive disorders. Every question on MCQs360 shows the correct answer instantly, so you can confirm what each enzyme and organ does as you revise.
- Biological Molecules 74
- Coordination and Control 72
- Biology Diagnostic 70
- Cell Structure and Function 67
- Biotechnology 65
- Reproduction 58
- Bioenergetics 55
- Circulation 50
- Inheritance 48
- Digestion 45
- Immunity 45
- Support and Movement 45
- Acellular Life (Viruses) 45
- Homeostasis 45
- Respiration and Gaseous Exchange 45
- Evolution 45
- Enzymes 45
- Cell Cycle 41
- Chromosome and DNA 40
- Biology Introduction 38
- Ecosystem 27
Which enzymes in pancreatic juice hydrolyse DNA and RNA in food?
Correct answer B. Nucleases
How many teeth are present in the complete permanent set of an adult human?
Correct answer D. 32
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During swallowing, what prevents food from entering the nasal cavity?
Correct answer B. The soft palate rises to close the nasopharynx
Which statement about the oesophagus is correct?
Correct answer D. It moves food to the stomach by peristalsis but secretes no digestive enzymes
Which feature of the stomach wall allows strong churning of food?
Correct answer D. An extra oblique layer of smooth muscle
What is the optimum pH for the activity of pepsin?
Correct answer B. About 2
What is the main purpose of the alkaline pancreatic juice entering the duodenum?
Correct answer A. To neutralise acidic chyme so intestinal enzymes can work
How is glucose absorbed from the lumen of the ileum into the epithelial cells?
Correct answer B. By active co-transport with sodium ions
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Which structures lie inside the core of each villus?
Correct answer C. A network of blood capillaries and a central lacteal
The cephalic phase of gastric secretion begins when food is seen, smelt or tasted. Through which nerve is it mediated?
Correct answer D. Vagus nerve
Gastric inhibitory peptide (GIP) released from the duodenum has which effect on the stomach?
Correct answer B. It reduces gastric secretion and slows stomach movements
What happens in the liver when blood glucose concentration rises after a meal?
Correct answer D. Excess glucose is converted to glycogen under the influence of insulin
What is the role of Kupffer cells in the liver?
Correct answer D. Phagocytosis of bacteria and worn-out red blood cells
In the liver, what is formed from the amino groups removed from excess amino acids?
Correct answer D. Urea
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Which of the following is NOT a function of the liver?
Correct answer B. Secretion of insulin
Which bacterium is a major cause of peptic ulcers?
Correct answer D. Helicobacter pylori
Absorbed glucose and amino acids are carried first to which organ?
Correct answer D. Liver
Why can severe diarrhoea be dangerous, especially in children?
Correct answer D. Large losses of water and salts cause dehydration
The vermiform appendix arises from which part of the gut?
Correct answer C. Caecum
About Digestion MCQs
Questions follow food through the mouth, oesophagus, stomach, small intestine and large intestine, asking about chewing, salivary glands, peristalsis, gastric juice and the formation of chyme. Enzyme questions cover salivary amylase, pepsin, rennin, pancreatic enzymes and the role of hydrochloric acid. The associated glands section tests the liver, gall bladder and pancreas, the action of bile, and hormones such as gastrin, secretin and cholecystokinin. Further questions cover the structure of villi, the absorption of digested food into blood capillaries and lacteals, and disorders such as peptic ulcers, diarrhoea and constipation.
Key facts to remember
- Salivary amylase begins the digestion of starch in the mouth.
- Pepsin breaks proteins down into shorter polypeptides in the acidic stomach.
- Bile is made in the liver and stored in the gall bladder; it emulsifies fats but contains no digestive enzymes.
- Secretin from the duodenum stimulates the pancreas to release juice rich in hydrogencarbonate.
- The parotid glands are the largest salivary glands.
- The bacterium Helicobacter pylori is a major cause of peptic ulcers.
Exams that include Digestion MCQs
Pakistan
- MDCAT
- NUMS
- AKU
- FSc boards
India
- NEET
Bangladesh
- HSC
- Medical Admission Test
How to prepare for Digestion MCQs
- Make a table of digestive enzymes listing where each is made, its substrate, its products and its optimum pH.
- Learn the three gut hormones, gastrin, secretin and cholecystokinin, with where they are made and what they do.
- Draw a villus and label the blood capillaries and lacteal, noting which products enter each.
- Revise the functions of the liver beyond bile, such as storing glycogen and making urea.
Frequently asked questions
Which exams ask Digestion MCQs?
In Pakistan, Digestion questions appear in MDCAT, the NUMS and AKU entry tests and FSc board papers. Students in India meet the same content in NEET, and in Bangladesh it is tested in HSC Biology and the Medical Admission Test.
How does bile help in fat digestion?
Bile salts emulsify fats, breaking large fat droplets into many tiny droplets. This greatly increases the surface area on which pancreatic lipase can act. Bile is also alkaline and helps neutralise acidic chyme entering the duodenum, but it contains no enzymes.
Where is most food absorbed in the human gut?
Most digested food is absorbed in the small intestine, especially the ileum. Its lining is folded into millions of villi and microvilli, giving a very large surface area, and each villus contains blood capillaries and a lacteal to carry absorbed products away.
Last reviewed October 2026