Free Practice Quiz Question List

4 Digestion and Nutrient Absorption Online Quiz Questions

Use this free practice quiz with 20 questions to review 4 Digestion and Nutrient Absorption, test your knowledge, and prepare for your next test or exam.

20 questions

Choose one

1 point

A person's small intestine produces insufficient lactase. What is the most direct digestive consequence?

A
Lactose is completely converted into amino acids.
B
Some lactose remains undigested because it is not split into glucose and galactose.
C
Lactose is absorbed intact into the lymph as a chylomicron.
D
The colon produces lactase to digest all of the lactose.

Choose one

1 point

A type of dietary fiber resists human digestive enzymes and reaches the colon. Which outcome is consistent with its processing there?

A
All fiber is broken down by stomach pepsin.
B
Fiber is absorbed intact into the blood in the stomach.
C
Colon microbes may ferment some fiber, while the remainder contributes to stool.
D
Fiber is converted into bile by the gallbladder.

Written response

1 point

Vitamin B₁₂ absorption depends on intrinsic factor. In which section of the small intestine does this absorption take place? Enter the section name.

Choose one

1 point

After proteins are digested into amino acids and small peptides, what is their main route from the intestinal lining?

A
They cross intestinal cells and enter the blood.
B
They are packaged into chylomicrons and enter lymphatic vessels first.
C
They remain in the intestinal contents until they reach the colon.
D
They enter the stomach and then pass directly into the liver.

Choose one

1 point

A disruption prevents the pancreas from releasing bicarbonate into the duodenum. Which digestive function is directly reduced?

A
It packages absorbed fats into chylomicrons.
B
It stores bile until food enters the stomach.
C
It absorbs most nutrients from the intestinal contents.
D
It helps neutralize acidic chyme in the duodenum.

Choose one

1 point

Inflammation damages the small-intestinal lining and reduces the function of its villi. What is the most likely direct effect?

A
The intestine would gain a larger surface area for absorption.
B
The intestine's capacity to absorb nutrients could decrease.
C
The liver would begin producing digestive enzymes.
D
The colon would stop absorbing any water or electrolytes.

Choose one

1 point

A person has inadequate bile delivery into the small intestine. Which combination of effects is most likely?

A
It would mainly prevent amino acids from entering the blood.
B
It would stop the colon from absorbing water.
C
It could impair fat digestion and absorption of vitamins A, D, E, and K.
D
It would prevent intrinsic factor from being made in the ileum.

Choose one

1 point

After many long-chain fats are digested, which sequence best describes their route toward the bloodstream?

A
They pass directly from the intestinal contents into the colon.
B
They are packaged into chylomicrons, which enter lymphatic vessels in the villi before reaching the bloodstream.
C
They enter the blood as individual triglycerides without first crossing intestinal cells.
D
They are carried to the stomach by the gallbladder.

Choose one

1 point

A person begins chewing a piece of bread. Which nutrient does an enzyme in saliva begin to digest?

A
Starch
B
Protein
C
Fat
D
Minerals

Choose all

1 point

Select all statements that accurately describe the stomach's role in digestion.

A
Muscular mixing helps turn food into chyme.
B
Stomach acid helps unfold proteins and activates pepsin.
C
Most nutrients are absorbed through the stomach lining.
D
Pepsin begins the digestion of proteins.

Choose all

1 point

Select all statements that correctly describe carbohydrate digestion and the route of its final products.

A
Amylase breaks starch into smaller sugars.
B
Enzymes on the intestinal surface complete carbohydrate digestion.
C
Glucose, galactose, and fructose cross into intestinal cells and then enter the blood.
D
The final products of carbohydrate digestion enter lymph before reaching the blood.

True or false

1 point

Water and electrolytes are absorbed in both the small and large intestines.

A
True
B
False

True or false

1 point

After the large intestine absorbs remaining water and electrolytes, the remaining material forms stool that passes through the rectum before exiting the body.

A
True
B
False

Written response

1 point

What is the name of the muscular waves that move a swallowed bolus through the esophagus?

Written response

1 point

What is the fluid mixture called that forms when the stomach mixes food?

Written response

1 point

Which organ produces bile, which is then stored and released by the gallbladder?

Fill in the blank

1 point

After chewing and mixing with saliva, food forms a that is swallowed into the esophagus.

Fill in the blank

1 point

The pancreas releases digestive enzymes into the , the first segment of the small intestine.

Open ended

1 point

Trace what happens to starch in a piece of bread from chewing through absorption of its final digestion products. Include the roles of saliva, the stomach, and the small intestine, and state where the absorbed products go.

True or false

1 point

True or false: A dietary mineral can be absorbed without first being broken down by digestive enzymes.

A
True
B
False