Digestive System Quizzes: Test Your Knowledge on Human Digestion

Question 1

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

Accepted Answer

Absorption of nutrients

Answer

Mechanical breakdown of food

Answer

Chemical digestion of proteins

Answer

Secretion of hydrochloric acid and enzymes

Question 2

The main function of the esophagus is to:

Accepted Answer

Transport food from the mouth to the stomach

Answer

Secrete digestive enzymes

Answer

Absorb nutrients

Answer

Store food for later digestion

Question 3

What is the main function of the large intestine?

Accepted Answer

Absorb water and electrolytes, forming solid stools

Answer

Break down proteins and carbohydrates

Answer

Produce enzymes for digestion

Answer

Store and release bile

Question 4

What is the primary function of the small intestine?

Accepted Answer

Nutrient absorption

Answer

Mechanical digestion

Answer

Chemical digestion

Answer

Food storage

Question 5

Which of the following is NOT a potential cause of gastritis?

Accepted Answer

Vitamin B12 deficiency

Answer

Helicobacter pylori infection

Answer

Excessive alcohol consumption

Answer

Stress

Question 6

Which muscular tube connects the mouth to the stomach?

Accepted Answer

Esophagus

Answer

Pharynx

Answer

Trachea

Answer

Bronchus

Question 7

Which hormone triggers the release of bile from the gallbladder?

Accepted Answer

Cholecystokinin

Answer

Gastrin

Answer

Insulin

Answer

Glucagon

Question 8

Which of the following is NOT a common symptom of irritable bowel syndrome (IBS)?

Accepted Answer

Fever

Answer

Abdominal pain

Answer

Diarrhea

Answer

Constipation

Question 9

What is the condition called when stomach contents flow back into the esophagus?

Accepted Answer

Heartburn

Answer

Ulcer

Answer

Diverticulitis

Answer

Gastritis

Question 10

Which vitamin plays a crucial role in calcium absorption?

Accepted Answer

Vitamin D

Answer

Vitamin A

Answer

Vitamin C

Answer

Vitamin E

Question 11

Which of the following is NOT a primary function of the digestive system?

Accepted Answer

Regulation of blood sugar levels

Answer

Digestion of food

Answer

Absorption of nutrients

Answer

Elimination of waste

Question 12

Which anatomical structure in the digestive system is primarily responsible for the initial mechanical breakdown of food?

Accepted Answer

Mouth

Answer

Stomach

Answer

Small intestine

Answer

Large intestine

Question 13

Which digestive enzyme is responsible for initiating the breakdown of proteins in the stomach?

Accepted Answer

Pepsin

Answer

Amylase

Answer

Lipase

Answer

Lactase

Question 14

Which hormone is the primary stimulator of gastric juice secretion in the stomach?

Accepted Answer

Gastrin

Answer

Insulin

Answer

Glucagon

Answer

Adrenaline

Question 15

Which organ in the digestive system performs the essential functions of filtering blood and producing bile?

Accepted Answer

Liver

Answer

Pancreas

Answer

Gallbladder

Answer

Spleen

Question 16

Which of the following is a common digestive disorder characterized by chronic inflammation of the small intestine?

Accepted Answer

Celiac disease

Answer

Irritable bowel syndrome

Answer

Gout

Answer

Ulcerative colitis

Question 17

Which nutrient is vital for maintaining strong and healthy bones and teeth?

Accepted Answer

Calcium

Answer

Iron

Answer

Potassium

Answer

Vitamin C

Question 18

Which clinical feature is unique to irritable bowel syndrome (IBS) and helps distinguish it from other conditions with similar symptoms?

Accepted Answer

Abdominal pain relieved by bowel movements

Answer

Bloody diarrhea

Answer

Significant weight loss

Answer

High fever

Question 19

Which type of digestion is primarily responsible for breaking down proteins in the stomach?

Accepted Answer

Proteolytic

Answer

Lipolytic

Answer

Carbohydolytic

Question 20

Which enzyme initiates protein digestion in the stomach?

Accepted Answer

Pepsin

Answer

Trypsin

Answer

Amylase

Answer

Lipase

Question 21

Where does the majority of nutrient absorption occur in the digestive system?

Accepted Answer

Small intestine

Answer

Large intestine

Answer

Stomach

Question 22

Which hormone is primarily responsible for stimulating the secretion of gastric acid in the stomach?

Accepted Answer

Gastrin

Answer

Epinephrine

Answer

Insulin

Answer

Glucagon

Question 23

What is the name of the muscular valve that prevents the backflow of stomach contents into the esophagus?

Accepted Answer

Lower esophageal sphincter

Answer

Pyloric sphincter

Answer

Cardiac sphincter

Answer

Ileocecal valve

Question 24

Which type of bacteria commonly resides in the large intestine and is involved in the synthesis of certain vitamins?

Accepted Answer

Lactobacillus

Answer

Staphylococcus

Answer

Streptococcus

Answer

Escherichia coli

Question 25

What is the primary function of the villi that line the small intestine?

Accepted Answer

Increase surface area for nutrient absorption

Answer

Transport nutrients directly into the bloodstream

Answer

Secrete digestive enzymes

Answer

Store bile

Question 26

What is the term for the inflammation of the intestinal lining?

Accepted Answer

Enteritis

Answer

Hepatitis

Answer

Gastritis

Answer

Colitis