during early tooth development vitamin a deficiency leads to enamel hypoplasia and defective dentin formation because of its effect on soft tissues an
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Nursing Elites

ATI RN

ATI Nutrition Proctored Exam

1. During early tooth development, vitamin A deficiency leads to enamel hypoplasia and defective dentin formation. Because of its effect on soft tissues and bone, vitamin A contributes to normal spacing of teeth.

Correct answer: A

Rationale: Both statements are true. The effect of vitamin A on the growth of soft tissues and bones naturally extends to the teeth and surrounding structures. Enamel hypoplasia, involving defective enamel matrix and incomplete calcification of enamel and dentin, can be due to vitamin A deficiency. The effect of this vitamin upon surrounding bone directly affects spacing patterns of the teeth within the bone and dentition. Choice A is correct because both statements accurately describe the influence of vitamin A on tooth development. Choices B, C, and D are incorrect as they do not reflect the accuracy of the statements provided.

2. What should Mrs. Smith do to increase her HDL levels, as advised by the nurse?

Correct answer: B

Rationale: The correct answer is 'Quit smoking.' Smoking has been shown to lower HDL (High-Density Lipoprotein) levels, and quitting can help to improve these levels. HDL is often referred to as 'good cholesterol' because it helps to remove other forms of cholesterol from the bloodstream, reducing the risk of heart disease. While monitoring blood glucose levels, controlling blood pressure, and taking fish oil supplements can contribute to overall health and wellbeing, they do not directly increase HDL levels in the same way that quitting smoking does. Therefore, quitting smoking is the most effective way for Mrs. Smith to increase her HDL levels as advised by the nurse.

3. Which statement by a client indicates a need for further teaching about food safety?

Correct answer: C

Rationale: The correct answer is C because drinking unpasteurized milk can contain harmful bacteria, which poses a risk to food safety. Choice A is correct as it emphasizes using food before the expiration date. Choice B is also correct as washing fruits before consumption is a good food safety practice. Choice D is correct as well since washing hands after handling raw chicken is crucial to prevent cross-contamination. Therefore, choice C is the only statement that indicates a need for further teaching on food safety.

4. All of the following are electrolytes except:

Correct answer: D

Rationale: Iron is not an electrolyte; electrolytes like sodium, potassium, and chloride help maintain fluid balance and are critical for nerve and muscle function.

5. During which stage of life is it most critical to build bone mass to prevent osteoporosis?

Correct answer: C

Rationale: Adolescence is the most critical stage for building bone mass, which plays a significant role in preventing osteoporosis in later life. During adolescence, approximately 45% of adult bone mass is formed. Although bone mass can be built during infancy, early childhood, and young adulthood, it is not as significant as during adolescence, making choices A, B, and D incorrect. Therefore, focusing on adequate nutrition and physical activity during adolescence is vital for long-term bone health.

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