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. Which of the following statements is false?

Correct answer: B

Rationale: The statement that the major function of vitamin E is promoting vision is incorrect. Vitamin E primarily acts as an antioxidant, protecting cells from oxidative damage. Its role is not primarily related to vision, which is a major function of vitamin A. On the other hand, the other options are true. Vitamin K deficiency does indeed lead to increased clotting time, vitamin D functions as a hormone, and carrots, sweet potatoes, and butternut squash are rich sources of beta-carotene.

3. Baby John develops hyperbilirubinemia. What is a method used to treat hyperbilirubinemia in a newborn?

Correct answer: A

Rationale: Patient safety and efficacy of care depend on actions rooted in established nursing protocols that consider both the immediate and long-term needs of the patient.

4. Each of the following describes the physiologic roles of water, except one. Which is the exception?

Correct answer: D

Rationale: The correct answer is D. Water regulates body temperature by evaporating as perspiration from the skin, not by pooling. When sweat evaporates from the skin, it takes away heat, which helps cool the body. Choices A, B, and C are correct because water acts as a solvent for chemical reactions, maintains the stability of body fluids, and enables the transport of nutrients and excretion of waste, respectively.

5. In monitoring the patient in PACU, the nurse correctly identifies that checking the patient's vital signs is done every:

Correct answer: A

Rationale: Correct Answer: A - Vital signs monitoring in the PACU (Post-Anesthesia Care Unit) is typically done every hour to closely monitor the patient's condition during the immediate postoperative period. This frequency allows the nurse to promptly identify any changes in the patient's vital signs and intervene as necessary. Choice B (5 minutes) is too frequent for routine vital signs monitoring in the PACU and may not allow for a comprehensive assessment of the patient's stability. Choice C (15 minutes) and Choice D (30 minutes) are also not in line with the standard practice of vital signs monitoring in the PACU, which is typically hourly.

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