which enzyme digests fiber in the large intestine

ATI RN

Proctored Nutrition ATI

1. Which enzyme digests fiber in the large intestine?

A. salivary amylase
B. pancreatic amylase
C. cellulase
D. none of the above

Correct answer: D

Rationale: The correct answer is 'none of the above.' Human digestive enzymes like salivary amylase and pancreatic amylase cannot digest fiber. Instead, fiber is fermented by gut bacteria in the large intestine. Cellulase, which is an enzyme produced by some animals and microorganisms, can break down cellulose found in plants, but it is not a human digestive enzyme, making it an incorrect choice in this context.

2. Which systolic blood pressure measurement is classified as prehypertension?

A. 106 mmHg
B. 119 mmHg
C. 130 mmHg
D. 141 mmHg

Correct answer: B

Rationale: According to the blood pressure classification, a systolic blood pressure between 120-139 mmHg is considered prehypertension. This range indicates an increased risk for developing hypertension if not managed appropriately. Therefore, a systolic blood pressure of 119 mmHg falls into the prehypertension category. A systolic pressure of 106 mmHg is within the normal range, while 130 mmHg and above would be classified as stage 1 and stage 2 hypertension respectively, not prehypertension.

3. Magnesium's major functions in the body would be least likely to include which of the following?

A. allowing muscles to relax after contraction
B. assisting the operation of hundreds of enzymes
C. synthesis of protein in the soft tissues
D. regulation of body temperature

Correct answer: D

Rationale: Magnesium plays a key role in muscle relaxation, enzyme operation, and protein synthesis, but it is not directly involved in regulating body temperature.

4. The dietary guidelines for Americans recommend consuming:

A. nutrient dense foods
B. non-essential amino acids
C. energy dense foods
D. organically grown foods

Correct answer: A

Rationale: The guidelines emphasize nutrient-dense foods that provide essential vitamins, minerals, and other nutrients without excessive calories, sugars, or unhealthy fats.