negative nitrogen balance occurs in an

ATI LPN

ATI Nutrition Proctored Exam 2019 Answers

1. In which individual does negative nitrogen balance occur?

A. Adult who engages in a weight-training program.
B. Woman who is pregnant or lactating.
C. Child who is growing.
D. Older adult with anorexia.

Correct answer: D

Rationale: Negative nitrogen balance occurs when the body loses more nitrogen than it gains. This imbalance is often seen in conditions like anorexia in older adults, where insufficient protein intake leads to muscle breakdown and negative nitrogen balance. Choices A, B, and C do not typically lead to negative nitrogen balance as seen in anorexia in older adults.

2. After ingested food is mixed and churned with gastric secretions, the resulting semifluid mass is called:

A. a bolus.
B. chyme.
C. rennin.
D. glycogen.

Correct answer: B

Rationale: The correct answer is B: chyme. Chyme is the partially digested food that forms a semifluid mass after mixing with gastric juices. A is incorrect because a bolus refers to a rounded mass of food ready to be swallowed. C, rennin, is an enzyme involved in the digestion of milk proteins and not the term for the semifluid mass after food mixing with gastric secretions. D, glycogen, is a form of stored glucose in the body and is not the term used to describe the partially digested food mass in the stomach.

3. Why is it important to understand standard serving sizes of foods?

A. it is easy to eat too much of some nutrients when choosing healthful foods.
B. serving sizes have generally decreased over the past few decades.
C. most people have difficulty estimating the amount of food they eat.
D. food portions need to be weighed to check serving sizes accurately.

Correct answer: C

Rationale: The correct answer is C. Understanding serving sizes is crucial because most people have difficulty estimating the amount of food they eat. It helps individuals accurately track their intake, which is essential for maintaining a healthy diet and avoiding overeating. Choice A is incorrect because the question focuses on portion sizes rather than specific nutrients. Choice B is incorrect as it presents an unsupported claim about serving sizes decreasing. Choice D is incorrect as weighing food portions is not always necessary to check serving sizes; understanding standard serving sizes allows for a more practical approach to portion control.

4. What can excessive intakes of dietary protein do?

A. cause vitamin deficiencies.
B. impair kidney function.
C. increase weight loss.
D. decrease production of indispensable amino acids.

Correct answer: B

Rationale: Excessive intake of dietary protein can lead to impaired kidney function over time. Excessive protein consumption can put a strain on the kidneys as they work to eliminate the byproducts of protein metabolism. This can potentially lead to kidney damage. Choices A, C, and D are incorrect. Excessive protein intake is not directly linked to causing vitamin deficiencies, increasing weight loss, or decreasing the production of indispensable amino acids.

5. What does the Tolerable Upper Intake Level (UL) represent?

A. a replacement for Recommended Dietary Allowances (RDAs).
B. a safe level of intake for people of all ages.
C. a potentially toxic level of intake of a nutrient.
D. the highest amount of a nutrient that can be safely consumed.

Correct answer: D

Rationale: The Tolerable Upper Intake Level (UL) represents the highest amount of a nutrient that can be safely consumed without causing adverse health effects. It is not a replacement for Recommended Dietary Allowances (RDAs) (choice A) which are nutrient intake recommendations. While the UL is established to prevent toxicity, it is not a completely safe level for people of all ages (choice B). It is also not a potentially toxic level of intake of a nutrient (choice C), but rather the level that is unlikely to cause adverse health effects.