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11 The Digestive System Online Quiz Questions

Use this free practice quiz with 20 questions to review 11 The Digestive System, test your knowledge, and prepare for your next test or exam.

20 questions
01
Choose one
1 point

Which statement best describes how the stomach begins the chemical digestion of proteins?

  1. A

    Acid begins protein digestion, while bile completes it in the stomach.

  2. B

    Acid helps denature proteins, and pepsin begins protein digestion.

  3. C

    Pepsin neutralizes stomach acid, and bicarbonate breaks down proteins.

  4. D

    Salivary amylase and insulin begin protein digestion in the stomach.

02
True or false
1 point

True or false: Bile helps with fat digestion by dispersing large fat droplets into smaller ones, but it is not a digestive enzyme.

  1. A

    True

  2. B

    False

03
Written response
1 point

What is the fluid mixture called that forms in the stomach and passes gradually into the small intestine?

04
Fill in the blank
1 point

In the mouth, begins digesting .

05
Choose one
1 point

After a meal, which function helps limit the movement of stomach contents back into the esophagus?

  1. A

    It releases bile into the esophagus.

  2. B

    It pushes food from the stomach into the colon.

  3. C

    It helps prevent stomach contents from flowing backward.

  4. D

    It absorbs nutrients from swallowed food.

06
Choose all
1 point

Select all the accessory digestive organs that support digestion even though food does not pass through them.

  1. A

    Liver

  2. B

    Stomach

  3. C

    Gallbladder

  4. D

    Pancreas

  5. E

    Small intestine

07
True or false
1 point

True or false: Most absorbed fats travel through intestinal lymph vessels before entering the bloodstream.

  1. A

    True

  2. B

    False

08
Written response
1 point

What is the term for waves of muscular contraction that propel and mix contents as they move through the GI tract?

09
Fill in the blank
1 point

In the large intestine, the colon absorbs . Gut microbes can produce .

10
Choose one
1 point

After sugars and amino acids enter intestinal blood vessels, which route carries blood from much of the intestine first to the liver?

  1. A

    Intestinal lymph vessels carry it directly to the liver.

  2. B

    The hepatic portal system carries it first to the liver.

  3. C

    The lower esophageal sphincter directs it to the liver.

  4. D

    The large intestine sends it first to the pancreas.

11
Choose all
1 point

Select all the statements that correctly describe how the nervous system and hormones help coordinate digestion.

  1. A

    Signals from the brain and enteric nervous system help regulate digestive movement and secretions.

  2. B

    Digestive movement and secretions are controlled only by the liver.

  3. C

    Hormones released by the colon prevent food from entering the small intestine.

  4. D

    Hormones from the stomach and small intestine help coordinate digestion with the arrival of food.

12
Choose one
1 point

After a meal, blood glucose rises. Which response helps many tissues take up and store glucose?

  1. A

    The pancreas releases glucagon to stop the liver from making glucose.

  2. B

    The gallbladder releases insulin to package glucose into chylomicrons.

  3. C

    The liver releases pepsin to move glucose into intestinal lymph vessels.

  4. D

    The pancreas releases insulin, promoting glucose uptake and storage in many tissues.

13
Choose one
1 point

Acidic stomach contents enter the small intestine. Which pancreatic contribution helps with digestion at this point?

  1. A

    It stores bile and releases it to neutralize acid.

  2. B

    It absorbs most nutrients and sends them directly into lymph vessels.

  3. C

    It supplies digestive enzymes and bicarbonate, which helps neutralize stomach acid.

  4. D

    It produces pepsin and stores the chyme formed in the stomach.

14
Open ended
1 point

Between meals, blood glucose falls. Explain how glucagon and the liver help make glucose available to the body.

15
Choose one
1 point

After a person swallows, which structure helps keep stomach contents from flowing back into the esophagus?

  1. A

    The lower esophageal sphincter helps prevent stomach contents from flowing backward.

  2. B

    The pharynx releases enzymes that neutralize stomach acid.

  3. C

    The esophagus stores food until the stomach is empty.

  4. D

    The upper esophageal sphincter mixes food with stomach acid.

16
True or false
1 point

Most absorbed dietary fats travel through intestinal lymph vessels before reaching the bloodstream, whereas sugars and amino acids enter blood capillaries.

  1. A

    True

  2. B

    False

17
Choose one
1 point

Acidic chyme is entering the small intestine. Which pancreatic secretion helps make this environment less acidic?

  1. A

    Pepsin, which increases the acidity of the chyme.

  2. B

    Bicarbonate, which helps neutralize the stomach acid.

  3. C

    Bile, which acts as an enzyme to break down proteins.

  4. D

    Insulin, which directly neutralizes acid in the intestine.

18
Choose one
1 point

Which statement best explains how bile supports fat digestion?

  1. A

    It is an enzyme that splits fat molecules into amino acids.

  2. B

    It converts starch into simple sugars in the mouth.

  3. C

    It disperses large fat droplets into smaller ones to help enzymes digest fats.

  4. D

    It carries fats directly from the stomach into intestinal blood vessels.

19
Written response
1 point

What vein carries blood from much of the intestine first to the liver?

20
Written response
1 point

When blood glucose rises, what hormone does the pancreas release to promote glucose uptake and storage in many tissues?