branched chain amino acids leucine isoleucine and valine may be especially important for a patient with

ATI LPN

ATI Nutrition Proctored Exam 2019 Answers

1. Which condition may benefit from branched chain amino acids (leucine, isoleucine, and valine)?

A. cancer-related malnutrition
B. marasmus
C. cardiovascular disease
D. severe depression

Correct answer: A

Rationale: Branched chain amino acids, such as leucine, isoleucine, and valine, are essential in preventing muscle breakdown. Therefore, they may be particularly important for a patient with cancer-related malnutrition, where maintaining muscle mass is crucial. Marasmus is a severe form of malnutrition characterized by energy deficiency, not specifically related to cancer. Cardiovascular disease and severe depression do not have a direct correlation with the need for branched chain amino acids to prevent muscle breakdown.

2. The Acceptable Macronutrient Distribution Range for fat recommends that the percentage of total kcalories from fat should fall between:

A. 10% and 20%.
B. 20% and 25%.
C. 20% and 35%.
D. 30% and 45%.

Correct answer: C

Rationale: The Acceptable Macronutrient Distribution Range (AMDR) for fat suggests that 20% to 35% of total kcalories should come from fat. This range is recommended to maintain good health. Choices A, B, and D are incorrect because they do not fall within the specified range. A lower percentage (10-20%) may not provide enough essential fatty acids, while a higher percentage (30-45%) may increase the risk of health issues associated with excessive fat consumption.

3. What is one useful outcome of keeping a record of everything you eat and drink for a day?

A. Precise estimates of portion sizes.
B. Determination of appropriate energy intake.
C. Estimation of supplement needs.
D. Increased awareness of personal food patterns.

Correct answer: D

Rationale: The correct answer is D: Increased awareness of personal food patterns. Keeping a food record is beneficial as it helps individuals become more mindful of their eating habits and food choices. This awareness can lead to identifying patterns, triggers, and areas for improvement in one's diet. Choices A, B, and C are incorrect because the primary benefit of keeping a food record is not about precise estimates of portion sizes, determining energy intake, or estimating supplement needs, but rather about developing a deeper understanding of personal food patterns.

4. Which of the following types of fiber is not a carbohydrate?

A. gums
B. lignin
C. pectin
D. cellulose

Correct answer: B

Rationale: Lignin is the correct answer because it is a type of fiber that is not a carbohydrate and provides structure to plant cell walls. Gums (choice A), pectin (choice C), and cellulose (choice D) are all types of dietary fiber that are carbohydrates. Gums are a type of soluble fiber, pectin is found in fruits and is a soluble fiber, and cellulose is a type of insoluble fiber found in plant cell walls.

5. At what pH does the digestion of protein by pepsin in the stomach require?

A. 1.8 and 3.5.
B. 4.8 and 7.0.
C. 6.8 and 8.5.
D. 7.8 and 10.0.

Correct answer: A

Rationale: The correct answer is A: 1.8 and 3.5. Pepsin, an enzyme involved in protein digestion, functions optimally in an acidic environment, specifically between pH 1.8 and 3.5. This low pH is necessary for pepsin to break down proteins effectively. Choices B, C, and D are incorrect because pepsin requires a highly acidic environment, ruling out the pH ranges listed in those options.