Free Digestion MCQs with Answers
680 Digestion MCQs from Biology, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
The human digestive system covers the organs from mouth to anus, the movement of food, and the mechanical and chemical breakdown of carbohydrates, proteins and fats. It also includes the roles of digestive enzymes, bile, absorption through intestinal villi, and the assimilation of nutrients by body cells.
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Read the Digestion notesFree MDCAT chapter notes with key terms680 questions · page 16 of 34
- A. HCI
- B. Mucus
- C. Enterokinase
- D. Gastrin
Explanation: Enterokinase is an enzyme produced by cells of the duodenum and is involved in digestion in humans and other animal.
Correct answer: Enterokinase- A. Duodenum
- B. Ileum
- C. Jejunum
- D. Colon
Explanation: Ileum is the 3rd part of small intestine and absorption of all type of food components such as monosaccharides, amino acids, fatty acids…
Correct answer: Ileum- A. Saliva
- B. Pancreatic juice
- C. Bile
- D. Gastric juice
Explanation: All secretions have enzymes except bile It is involved in mechanical digestion of fats which is called emulsification.
Correct answer: Bile- A. Pancreas
- B. Mouth
- C. Gallbladder
- D. Liver
Explanation: Pancrease provides a set of enzymes and NaHCO3 for digestion of carbohydrates, protiens and fats. Liver has no enzymatic secretion.
Correct answer: Pancreas- A. Bicarbonate, liver
- B. Hydrogen, duodenum
- C. Bicarbonate, duodenum
- D. Bicarbonate, pancreas
Explanation: Pancrease has NaHCO3which neutralizes the acidic content of food and liver has bile salts for emulsification..
Correct answer: Bicarbonate, pancreas- A. NaHC03
- B. Amino peptidase
- C. Chymotrypsinogen
- D. Amylopsin
Explanation: Small intestine secretes aminopeptidase enzyme.
Correct answer: Amino peptidase- A. Gastric juice
- B. Pancreatic juice
- C. Bile
- D. Oral secretions
Explanation: Pancreas has complete set of enzymes for digestion of all principal components (carbohydrates, proteins and lipids) of food.
Correct answer: Pancreatic juice- A. It produces digestive enzymes.
- B. Detoxify chemicals and drugs
- C. Filters blood
- D. Produces albumin and prothrombin
Explanation: Liver does not secrete digestive enzymes, instead it secretes bile, a solution which helps in fat digestion by turning it into smaller…
Correct answer: It produces digestive enzymes.- A. Saliva
- B. Gastrin
- C. Pancreatic juice
- D. Bile
Explanation: When bile enters the small intestine, it mixes with the fat globules and cause them to break down into smaller units called emulsion…
Correct answer: Bile- A. Calcium oxalate molecules
- B. Cholesterol molecules
- C. Calcium phosphate molecules
- D. Uric acid molecules
Explanation: Gall stones are formed in gall bladder. Function of gall bladder is to concentrate bile.
Correct answer: Cholesterol molecules- A. Caecum
- B. Rectum
- C. Colon
- D. Anus
Explanation: Large intestine has colon in the form of ascending, transverse. descending and sigmoid colon
Correct answer: Colon- A. Digests all type of food
- B. Is the longest part of GIT
- C. Absorbs H2O + electrolytes
- D. Is connected to s tomach
Explanation: Large intestine provides site for absorption of water and electrolytes
Correct answer: Absorbs H2O + electrolytes- A. Pyloric sphineter
- B. Ileocecal sphincter
- C. Cardiac sphincter
- D. Anal sphincter
Explanation: Ileocecal sphincter allows materials to pass from ileum to large intestine.
Correct answer: Ileocecal sphincter- A. A- Ascending colon, B- Ileocecal valve, C- Ileum, D- Appendix, E- Caecum
- B. A- Rectum, B- Ileocecal valve, C- Appendix, D- Small intestine, E- Colon
- C. A- Transverse colon, B- Ileocecal valve, C- Jejunum, D- Ileum, E- Caecum
- D. A- Colon, B- Ileocecal valve, C- Appendix, D- Ileum, E- Rectum
Explanation: A=Ascending colon, B=Ileocecal sphineter C=Ileum, D=Appendix, E=Caecum.
Correct answer: A- Ascending colon, B- Ileocecal valve, C- Ileum, D- Appendix, E- Caecum- A. Calcium
- B. Vitamin A
- C. Vitamin D
- D. Vitamin K
Explanation: In large intestine vitamin K is formed by the activity of a symbiotic bacterium: E coli.
Correct answer: Vitamin K- A. Colon
- B. Caecum
- C. Rectum
- D. Small intestine
Explanation: The appendix (vemiiform appendix) is a finger-like, blind-ended tube connected to the caecum.
Correct answer: Caecum- A. Dyspepsia
- B. Food poisining
- C. Obesity
- D. Piles
Explanation: Food poisoning indudes diarrhea, abdominal pain, and vomiting. As a result there can be severe loss of salts and water in body.
Correct answer: Food poisining- A. Dyspepsia
- B. Anorexia nervosa
- C. Obesity
- D. Piles
Explanation: Fat in controlled amount is not hazardous for health but when its level increases in body it can bad to a condition known as obesity.
Correct answer: Obesity- A. Larynx
- B. Epiglottis
- C. Glottis
- D. Trachea
Explanation: Goblet cells are mucous secreting unicellular structures, present in respiratory system and digestive system except stomach.
Correct answer: Trachea- A. Nasal cavity
- B. Trachea
- C. Bronchi
- D. Bronchioles
Explanation: Ciliated epithelium containing goblet cells is absent in bronchioles.
Correct answer: Bronchioles