ATI RN
ATI Proctored Nutrition Exam
1. Which of the following body processes is not dependent upon the presence of calcium in the body fluids?
- A. blood clotting
- B. transport of oxygen in the blood
- C. muscle contractions
- D. transmission of nerve impulses
Correct answer: B
Rationale: The transport of oxygen in the blood is carried out by hemoglobin, which does not require calcium; instead, calcium is essential for blood clotting, muscle contraction, and nerve transmission.
2. What physiologic role does calcium play in the body?
- A. Blood clotting, transmission of nerve impulses, muscle contraction and relaxation
- B. Calcium homeostasis, structural integrity of heart muscle
- C. No known metabolic function, caries-preventing properties
- D. ATP energy release; metabolism of fats, carbohydrates, proteins; regulates acid-base balance.
Correct answer: A
Rationale: The correct answer is A: 'Blood clotting, transmission of nerve impulses, muscle contraction and relaxation.' Calcium plays a crucial role in various physiological functions such as blood clotting, transmission of nerve impulses, muscle contraction and relaxation, membrane permeability, and activation of certain enzymes. Choice B is incorrect because while calcium is involved in calcium homeostasis, it is not the only role it plays in the body. Choice C is incorrect as calcium indeed has several known metabolic functions, and it is not solely for preventing caries. Choice D is also incorrect as the functions mentioned are primarily carried out by other nutrients and not specifically by calcium.
3. A client is being instructed by a nurse about foods that should be included in a low-fiber diet. Which statement by the client indicates understanding?
- A. I can cut up carrots and celery sticks for my lunch.
- B. I will eat a bran muffin for my mid-morning snack.
- C. I will have oatmeal with skim milk for my breakfast.
- D. I should choose canned peaches for my fruit serving.
Correct answer: D
Rationale: The correct answer is D because canned peaches are lower in fiber compared to the other options. Carrots, celery sticks, bran muffins, and oatmeal are high-fiber choices, which are not suitable for a low-fiber diet. Choosing canned peaches aligns with the requirements of a low-fiber diet.
4. The ideal time to begin taking folate to prevent neural tube defects is:
- A. Before conception
- B. Once pregnancy begins
- C. At 6 weeks
- D. Upon completion of the first trimester
Correct answer: A
Rationale: Folate is crucial before conception to prevent neural tube defects. Neural tube development occurs early in pregnancy, often before a woman knows she is pregnant.
5. 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.
- A. Both statements are true.
- B. Both statements are false.
- C. The first statement is true; the second is false.
- D. The first statement is false; the second is true.
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.