Digestion

Question 1

What is the first step in the digestion process?

Answer 1

Ingestion, which involves taking food into the mouth.

Question 2

True or False: Digestion only occurs in the stomach.

Answer 2

False.

Question 3

What is the role of saliva in digestion?

Answer 3

Saliva contains enzymes that begin the breakdown of carbohydrates.

Question 4

Fill in the blank: The enzyme __________ in saliva helps digest starches.

Answer 4

amylase.

Question 5

What is the function of the esophagus in digestion?

Answer 5

The esophagus transports food from the mouth to the stomach through peristalsis.

Question 6

Which organ produces gastric juice?

Answer 6

The stomach.

Question 7

What are the main components of gastric juice?

Answer 7

Hydrochloric acid, pepsin, and intrinsic factor.

Question 8

True or False: The stomach is responsible for nutrient absorption.

Answer 8

False.

Question 9

What is the primary function of the small intestine?

Answer 9

The small intestine is responsible for the majority of nutrient absorption.

Question 10

Which part of the small intestine is primarily involved in digestion?

Answer 10

The duodenum.

Question 11

What secretions come from the pancreas to aid digestion?

Answer 11

Pancreatic enzymes and bicarbonate.

Question 12

Fill in the blank: The __________ helps emulsify fats in the small intestine.

Answer 12

bile.

Question 13

What is the role of the liver in digestion?

Answer 13

The liver produces bile, which is stored in the gallbladder.

Question 14

True or False: The large intestine absorbs most nutrients.

Answer 14

False.

Question 15

What is the main function of the large intestine?

Answer 15

To absorb water and electrolytes and to form and store feces.

Question 16

What is the process of breaking down food into smaller molecules called?

Answer 16

Digestion.

Question 17

What is peristalsis?

Answer 17

The wave-like muscle contractions that move food through the digestive tract.

Question 18

Which enzyme in the stomach breaks down proteins?

Answer 18

Pepsin.

Question 19

What is the pH level of gastric juice?

Answer 19

Typically around 1.5 to 3.5.

Question 20

What does the term ‘chyme’ refer to?

Answer 20

The semi-liquid food mass that is formed in the stomach and passed into the small intestine.

Question 21

True or False: Digestion is a purely mechanical process.

Answer 21

False.

Question 22

What role do villi play in the small intestine?

Answer 22

Villi increase the surface area for absorption of nutrients.

Question 23

What is the significance of the intestinal flora?

Answer 23

Intestinal flora aid in digestion and produce certain vitamins.

Question 24

Fill in the blank: The __________ is the last part of the digestive tract.

Answer 24

anus.

Question 25

What triggers the release of bile from the gallbladder?

Answer 25

The presence of fat in the small intestine.

Question 26

What is the function of the sphincter muscles in the digestive system?

Answer 26

To control the passage of food and waste through the digestive tract.

Question 27

Which vitamin is produced by bacteria in the large intestine?

Answer 27

Vitamin K.

Question 28

What is the primary role of dietary fiber in digestion?

Answer 28

To aid in the movement of food through the digestive system.

Question 29

True or False: Digestion begins in the stomach.

Answer 29

False.

Question 30

What is the role of the gallbladder in digestion?

Answer 30

To store and concentrate bile.

Question 31

Fill in the blank: The __________ is responsible for detoxifying substances in the body.

Answer 31

liver.

Question 32

What is the term for the undigested food that is expelled from the body?

Answer 32

Feces.

Question 33

What is the importance of hydrochloric acid in the stomach?

Answer 33

It helps to digest food and kill harmful bacteria.

Question 34

What type of digestion occurs in the mouth?

Answer 34

Mechanical and chemical digestion.