Digestive System Quizzes: Test Your Knowledge in Biology

Question 1

Which of the following is NOT a function of the pancreas in digestion?

Accepted Answer

Producing bile for fat digestion

Answer

Producing hormones that regulate blood sugar levels

Answer

Neutralizing the acidity of stomach contents entering the small intestine

Answer

Secreting enzymes that break down carbohydrates, proteins, and fats

Question 2

Which of the following is the correct order in which food passes through the human digestive system?

Accepted Answer

Mouth, esophagus, stomach, small intestine, large intestine

Answer

Mouth, stomach, esophagus, small intestine, large intestine

Answer

Esophagus, mouth, stomach, small intestine, large intestine

Answer

Stomach, mouth, esophagus, small intestine, large intestine

Question 3

Which enzyme is primarily responsible for breaking down proteins in the human stomach?

Accepted Answer

Pepsin

Answer

Amylase

Answer

Lipase

Answer

Lactase

Question 4

What is the main function of the small intestine in the digestive system?

Accepted Answer

Absorption of nutrients

Answer

Digestion of complex carbohydrates

Answer

Storage of food

Answer

Secretion of digestive enzymes

Question 5

What is the primary role of bile in the digestive process?

Accepted Answer

To emulsify fats

Answer

To neutralize stomach acid

Answer

To break down carbohydrates

Answer

To activate digestive enzymes

Question 6

Which of the following is NOT a function of the pancreas in the human digestive system?

Accepted Answer

Absorption of water

Answer

Secretion of insulin

Answer

Secretion of digestive enzymes

Answer

Regulation of blood glucose levels

Question 7

What is the name of the muscular contractions that move food through the human digestive tract?

Accepted Answer

Peristalsis

Answer

Segmentation

Answer

Villi

Answer

Microvilli

Question 8

Which hormone is responsible for stimulating the production of gastric juices in the human stomach?

Accepted Answer

Gastrin

Answer

Secretin

Answer

Cholecystokinin

Answer

Insulin

Question 9

Which part of the human digestive system is responsible for the absorption of water and electrolytes?

Accepted Answer

Large intestine

Answer

Stomach

Answer

Small intestine

Answer

Liver

Question 10

What is the name of the hormone that inhibits gastric secretion and stimulates the secretion of pancreatic juices in humans?

Accepted Answer

Secretin

Answer

Cholecystokinin

Answer

Gastrin

Answer

Motilin

Question 11

Which of the following is NOT a defense mechanism employed by the digestive system to protect against harmful substances and pathogens?

Accepted Answer

Secretion of digestive enzymes

Answer

Production of mucus

Answer

Peristalsis and segmentation

Question 12

Which of the following is NOT a function of the liver?

Accepted Answer

Secretion of enzymes

Answer

Storage of glucose as glycogen

Answer

Detoxification of substances

Answer

Production of bile

Question 13

What is the name of the muscular tube that propels food from the pharynx to the stomach?

Accepted Answer

Esophagus

Answer

Trachea

Answer

Duodenum

Answer

Jejunum

Question 14

Which hormone stimulates the gallbladder to release bile?

Accepted Answer

Cholecystokinin

Answer

Gastrin

Answer

Secretin

Answer

Insulin

Question 15

What is the approximate pH range of the stomach during digestion?

Accepted Answer

1.5 - 2.0

Answer

7.0 - 7.4

Answer

10.0 - 11.0

Answer

12.0 - 13.0

Question 16

Which of the following is a common symptom associated with lactose intolerance?

Accepted Answer

Abdominal pain and bloating

Answer

Nausea and vomiting

Answer

Skin rash and hives

Answer

Headache and fever

Question 17

What is the name of the sphincter muscle located at the junction of the stomach and small intestine?

Accepted Answer

Pyloric sphincter

Answer

Cardiac sphincter

Answer

Esophageal sphincter

Answer

Anal sphincter

Question 18

Which of the following is considered a macronutrient?

Accepted Answer

Carbohydrates

Answer

Vitamins

Answer

Minerals

Answer

Water

Question 19

The stomach's functions exclude:

Accepted Answer

Nutrient absorption

Answer

Mechanical digestion

Answer

Chemical digestion

Answer

Food storage

Question 20

Which enzyme is responsible for breaking down fats?

Accepted Answer

Lipase

Answer

Amylase

Answer

Protease

Answer

Sucrase

Question 21

Villi and microvilli in the small intestine primarily serve to:

Accepted Answer

Increase surface area for absorption

Answer

Secrete digestive enzymes

Answer

Produce insulin

Answer

Store undigested food

Question 22

The primary function of the large intestine is:

Accepted Answer

Absorbing water

Answer

Digesting carbohydrates

Answer

Storing undigested food

Answer

Secreting digestive enzymes

Question 23

The oesophagus is lined with a layer of:

Accepted Answer

Epithelial cells

Answer

Endothelial cells

Answer

Smooth muscle cells

Answer

Cardiac muscle cells

Question 24

Which enzyme is responsible for starting the digestion of proteins in the stomach?

Accepted Answer

Pepsin

Answer

Amylase

Answer

Lipase

Answer

Trypsin

Question 25

In the human digestive system, what is the main function of the small intestine?

Accepted Answer

Absorbing nutrients into the bloodstream

Answer

Digesting proteins and carbohydrates

Answer

Breaking down food particles mechanically

Answer

Storing and mixing food temporarily

Question 26

Which enzyme is responsible for starting the digestion of proteins in the stomach?

Accepted Answer

Pepsin

Answer

Lipase

Answer

Amylase

Question 27

Which enzyme breaks down fats in the small intestine?

Accepted Answer

Lipase

Answer

Pepsin

Answer

Amylase

Answer

Sucrase

Question 28

Which of the following is NOT among the functions of the large intestine?

Accepted Answer

Nutrient absorption

Answer

Water absorption

Answer

Vitamin K synthesis

Answer

Waste storage

Question 29

Which enzyme is primarily responsible for breaking down proteins in the stomach?

Accepted Answer

Pepsin

Answer

Amylase

Answer

Lipase

Answer

Lactase

Question 30

What is the primary function of villi in the small intestine?

Accepted Answer

Absorbing nutrients

Answer

Secreting digestive enzymes

Answer

Protecting the intestinal lining

Answer

Producing hormones

Question 31

Which organ is responsible for secreting bile?

Accepted Answer

Liver

Answer

Pancreas

Answer

Stomach

Answer

Gallbladder

Question 32

What is the term for the muscular contractions that propel food through the esophagus?

Accepted Answer

Peristalsis

Answer

Segmentation

Answer

Digestion

Answer

Chyme formation

Question 33

Which hormone primarily stimulates gastric secretion in the stomach?

Accepted Answer

Gastrin

Answer

Cholecystokinin

Answer

Secretin

Answer

Insulin

Question 34

What is the name of the opening that connects the stomach and the small intestine?

Accepted Answer

Pyloric valve

Answer

Cardiac sphincter

Answer

Duodenum

Answer

Ileum

Question 35

Which of the following is a common digestive disorder involving inflammation of the stomach lining?

Accepted Answer

Gastritis

Answer

Ulcerative colitis

Answer

Irritable bowel syndrome

Answer

Celiac disease

Question 36

Through which sequence of digestive organs does food typically pass during digestion?

Accepted Answer

Mouth → Esophagus → Stomach → Small Intestine → Large Intestine

Answer

Mouth → Stomach → Esophagus → Small Intestine → Large Intestine

Answer

Esophagus → Mouth → Stomach → Small Intestine → Large Intestine

Answer

Stomach → Mouth → Esophagus → Small Intestine → Large Intestine

Question 37

Which digestive enzyme is responsible for breaking down proteins in the stomach?

Accepted Answer

Pepsin

Answer

Amylase

Answer

Lipase

Answer

Lactase

Question 38

What is the primary function of the villi in the small intestine?

Accepted Answer

Increase surface area for nutrient absorption

Answer

Secrete digestive enzymes

Answer

Store bile

Answer

Produce hormones

Question 39

Which hormone triggers the release of bile from the gallbladder?

Accepted Answer

Cholecystokinin (CCK)

Answer

Gastrin

Answer

Secretin

Answer

Insulin

Question 40

What is the name of the muscular tube that transports food from the mouth to the stomach?

Accepted Answer

Esophagus

Answer

Trachea

Answer

Pharynx

Answer

Epiglottis

Question 41

Which part of the large intestine is responsible for water and electrolyte absorption?

Accepted Answer

Colon

Answer

Rectum

Answer

Caecum

Answer

Appendix

Question 42

What is the primary function of peristalsis in the digestive system?

Accepted Answer

Propelling food and fluids through the digestive tract

Answer

Breaking down food particles

Answer

Secreting digestive juices

Answer

Absorbing nutrients

Question 43

Which pancreatic enzyme is responsible for breaking down proteins during digestion?

Accepted Answer

Trypsin

Answer

Lipase

Answer

Amylase

Answer

Pepsin

Question 44

Which of the following is NOT a key function of the small intestine?

Accepted Answer

Storage of undigested food

Answer

Production of enzymes

Answer

Absorption of nutrients

Answer

Digestion of carbohydrates, proteins, and fats

Question 45

Which hormone triggers the release of bile from the gallbladder?

Accepted Answer

Cholecystokinin (CCK)

Answer

Gastrin

Answer

Secretin

Question 46

List the correct sequence of structures through which food passes during digestion.

Accepted Answer

Mouth, esophagus, stomach, small intestine, large intestine

Answer

Stomach, small intestine, esophagus, mouth, large intestine

Answer

Large intestine, stomach, small intestine, esophagus, mouth

Question 47

Which of the following is the major enzyme involved in the digestion of carbohydrates?

Accepted Answer

Amylase

Answer

Pepsin

Answer

Lipase

Answer

Trypsin

Question 48

Which of the following is a primary function of the pancreas?

Accepted Answer

Secretion of digestive enzymes and hormones

Answer

Storage of bile

Answer

Reabsorption of water

Answer

Digestion of proteins

Question 49

Which part of the digestive system is primarily responsible for nutrient absorption?

Accepted Answer

Small intestine

Answer

Stomach

Answer

Esophagus

Answer

Large intestine

Question 50

Which of the following structures is primarily responsible for the absorption of water from undigested food?

Accepted Answer

Large intestine

Answer

Esophagus

Answer

Small intestine

Answer

Stomach

Question 51

Which hormone inhibits the secretion of gastric acid in the stomach?

Accepted Answer

Secretin

Answer

Gastrin

Answer

Cholecystokinin

Answer

Glucagon

Question 52

Which of the following is NOT considered a risk factor for colon cancer?

Accepted Answer

High consumption of fruits and vegetables

Answer

Obesity

Answer

Family history of colon cancer

Answer

Low intake of fiber