01
True or false
1 point
Mechanical digestion uses enzymes and other secretions to break large food molecules into smaller ones.
Free Practice Quiz Question List
7 The Digestive System Online Quiz Questions
Use this free practice quiz with 20 questions to review 7 The Digestive System, test your knowledge, and prepare for your next test or exam.
20 questions
02
Fill in the blank
1 point
After chewing and mixing food with saliva, the swallowed mass is called a .
03
Choose one
1 point
A swallowed bolus moves down the esophagus toward the stomach. Which movement pattern propels it forward?
- A
Segmentation
- B
Peristalsis
- C
Emulsification
- D
Absorption
04
Written response
1 point
What is the semifluid mixture produced when the stomach churns food with gastric juice?
05
Choose one
1 point
Which role does hydrochloric acid play in the stomach?
- A
It emulsifies fats into droplets.
- B
It absorbs most nutrients into blood capillaries.
- C
It denatures proteins and helps activate pepsin.
- D
It converts amino acids into proteins.
06
True or false
1 point
As contents pass through the large intestine, additional water and electrolytes are absorbed.
- A
True
- B
False
07
Written response
1 point
Which intestinal hormone promotes pancreatic bicarbonate secretion?
08
Choose one
1 point
Which statement correctly describes the source and storage of bile?
- A
The gallbladder produces it; the pancreas stores it.
- B
The liver produces it; the gallbladder stores and concentrates it.
- C
The stomach produces it; the liver stores and concentrates it.
- D
The pancreas produces it; the small intestine stores it.
09
Fill in the blank
1 point
Bile fats into small droplets, increasing the surface available to digestive enzymes.
10
True or false
1 point
In the small intestine, segmentation mainly mixes contents locally rather than propelling them over long distances.
- A
True
- B
False
11
Choose all
1 point
Which small-intestinal structures increase the surface area available for absorption? Select all that apply.
- A
Folds of the small intestine
- B
The lower esophageal sphincter
- C
Villi
- D
The gallbladder
- E
Microvilli
12
Choose all
1 point
Which are functions of pancreatic juice in digestion? Select all that apply.
- A
Supplies enzymes that digest carbohydrates
- B
Supplies enzymes that digest proteins
- C
Supplies enzymes that digest fats
- D
Provides bicarbonate that helps neutralize acidic chyme
- E
Emulsifies fats because it contains bile
13
Choose one
1 point
After water-soluble nutrients enter blood capillaries in the small intestine, which circulation carries them first to the liver?
- A
The lymphatic route through lacteals
- B
The esophageal route through peristalsis
- C
The hepatic portal circulation
- D
The route through the gallbladder
14
Open ended
1 point
After a meal containing bread and butter, describe how starch and fat are digested and how their absorbed products initially travel from the small intestine.
15
Written response
1 point
Which enzyme in saliva begins the digestion of starch while food is in the mouth?
16
Written response
1 point
What is the semifluid mixture called after the stomach churns food and mixes it with gastric juice?
17
Choose one
1 point
Which statement best distinguishes mechanical digestion from chemical digestion?
- A
Mechanical digestion breaks large molecules into smaller molecules, while chemical digestion only mixes food.
- B
Mechanical digestion physically breaks down and mixes food, while chemical digestion breaks large molecules into smaller ones using enzymes and other secretions.
- C
Mechanical digestion occurs only in the stomach, while chemical digestion occurs only in the mouth.
- D
Mechanical digestion absorbs nutrients, while chemical digestion moves food through the tract.
18
Choose one
1 point
What is an important role of hydrochloric acid in the stomach?
- A
It emulsifies fats and stores them until they enter the small intestine.
- B
It neutralizes acidic chyme after it leaves the stomach.
- C
It denatures proteins and helps activate pepsin.
- D
It absorbs amino acids into blood capillaries.
19
Choose one
1 point
In the small intestine, contents are repeatedly mixed by local contractions but are not mainly propelled over long distances. Which movement pattern is occurring?
- A
Alternating local contractions mix the contents and bring them into contact with the intestinal lining.
- B
Coordinated waves propel the contents forward over long distances.
- C
A sphincter closes to prevent contents from entering the intestine.
- D
The stomach churns its contents with gastric juice.
20
Choose one
1 point
Why do the folds, villi, and microvilli of the small intestine support efficient nutrient absorption?
- A
They produce hydrochloric acid that activates pepsin.
- B
They provide a large surface area for absorption.
- C
They prevent food from moving into the large intestine.
- D
They move absorbed fats directly into the stomach.