01
Choose one
1 point
How do folds, villi, and microvilli help the small intestine perform its function?
Free Practice Quiz Question List
8 The Digestive System Online Quiz Questions
Use this free practice quiz with 20 questions to review 8 The Digestive System, test your knowledge, and prepare for your next test or exam.
20 questions
02
Choose one
1 point
What does bile do that helps digestive enzymes act on fats?
- A
It breaks proteins into amino acids.
- B
It neutralizes acidic chyme.
- C
It disperses large fat globules into smaller droplets.
- D
It absorbs fats into the intestinal lining.
03
Choose one
1 point
A digestive enzyme in saliva starts breaking down starch. Which process is beginning?
- A
It begins starch digestion.
- B
It begins protein digestion.
- C
It emulsifies fats.
- D
It neutralizes acidic chyme.
04
Choose all
1 point
Select all accurate descriptions of the products formed when major nutrient molecules are digested.
- A
Carbohydrates can be broken down into simple sugars.
- B
Carbohydrates are broken down into amino acids.
- C
Proteins can be broken down into amino acids and small peptides.
- D
Proteins are broken down into monoglycerides.
- E
Triglycerides can be broken down into fatty acids and monoglycerides.
05
Choose all
1 point
Select all the accessory organs that assist digestion even though food does not pass through them.
- A
Mouth
- B
Salivary glands
- C
Liver
- D
Gallbladder
- E
Esophagus
- F
Pancreas
06
True or false
1 point
Stomach acid helps unfold proteins, while pepsin begins protein digestion.
- A
True
- B
False
07
True or false
1 point
Feces consist only of food material that was not digested or absorbed.
- A
True
- B
False
08
True or false
1 point
Gut bacteria use some of the substances that remain in the large intestine.
- A
True
- B
False
09
Written response
1 point
What are the intestinal lymphatic vessels called that absorb most long-chain fats before those fats enter the bloodstream?
10
Written response
1 point
What is the term for the semifluid mixture formed when the stomach churns food with gastric juice?
11
Fill in the blank
1 point
In the small intestine, localized contractions that mix contents with digestive juices are called .
12
Fill in the blank
1 point
As material passes through the colon, the large intestine absorbs to help conserve body fluids.
13
Open ended
1 point
Explain how rectal stretching and sphincter activity contribute to the elimination of stool.
14
Choose one
1 point
After a water-soluble nutrient such as a sugar is absorbed into a small-intestinal blood capillary, where does it travel first?
- A
They enter lymphatic lacteals and travel first to the heart.
- B
They enter blood capillaries and travel first to the liver through the hepatic portal circulation.
- C
They remain in the intestinal lumen until they reach the large intestine.
- D
They enter the esophagus and travel directly to the stomach.
15
Choose one
1 point
After chewing, which structure mixes food with saliva and shapes it into a bolus for swallowing?
- A
The teeth
- B
The tongue
- C
The pharynx
- D
The salivary glands
16
Choose one
1 point
If the body needs to produce bile, which organ performs that function?
- A
The gallbladder
- B
The pancreas
- C
The liver
- D
The stomach
17
Choose one
1 point
Acidic chyme enters the duodenum from the stomach. Which organ releases bicarbonate that helps neutralize it?
- A
The pancreas
- B
The gallbladder
- C
The liver
- D
The salivary glands
18
Choose one
1 point
Which small-intestine movement uses localized contractions to mix chyme with digestive juices without primarily propelling it forward?
- A
Defecation
- B
Emulsification
- C
Peristalsis
- D
Segmentation
19
Written response
1 point
Which enzyme in saliva begins starch digestion in the mouth?
20
Written response
1 point
Material remaining after most digestion and absorption has just left the ileum. What is the first structure of the large intestine it enters?