what is one benefit of using controls in an experiment
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Nutrition Final Exam Quizlet

1. What is one benefit of using controls in an experiment?

Correct answer: D

Rationale: The correct answer is D. Controls in an experiment ensure that the subjects are similar in all respects except for the treatment being tested. This allows for a fair comparison between the treatment group and the control group. Choice A is incorrect because the size of the groups is not the primary benefit of using controls. Choice B is incorrect as blinding, not controls, refers to subjects not knowing about the experiment. Choice C is incorrect as it pertains more to randomization than the use of controls.

2. What is a common symptom of a respiratory infection in infants?

Correct answer: A

Rationale: Wheezing is a common symptom of respiratory infections in infants, often associated with coughing and difficulty breathing. It occurs due to the narrowing of the airways. Choice B, 'High appetite,' is incorrect as respiratory infections usually lead to a decrease in appetite rather than an increase. Choice C, 'Increased thirst,' is incorrect as it is not a typical symptom of a respiratory infection in infants. Choice D, 'Lethargy,' can be a symptom of respiratory infections but is not as specific and common as wheezing.

3. What is critical for preventing complications in an infant with hypothyroidism?

Correct answer: B

Rationale: The correct answer is B: Cognitive impairment. In infants with hypothyroidism, prompt administration of oral thyroid hormone replacement is crucial to prevent cognitive impairment and other serious complications. Excessive growth (choice A) is not a typical complication of hypothyroidism in infants. While hypothyroidism can affect the nervous system (choice C), cognitive impairment is more specific to untreated cases. Damage to the urinary system (choice D) is not a common complication of hypothyroidism in infants.

4. What is a primary goal of managing diabetes mellitus in children?

Correct answer: C

Rationale: The primary goal of managing diabetes mellitus in children is to ensure normal growth and development. This involves maintaining stable blood glucose levels to prevent complications. Option A is incorrect because promoting weight gain is not a primary goal in managing diabetes; rather, the aim is to maintain a healthy weight. Option B is not the primary goal; although it is important to prevent episodes of hypoglycemia, the main focus is on overall management. Option D is incorrect as optimizing blood sugar control is a means to achieve the primary goal, which is ensuring normal growth and development.

5. What is a common complication of untreated type 1 diabetes in children?

Correct answer: A

Rationale: Diabetic ketoacidosis is a serious complication of untreated type 1 diabetes in children. It is characterized by high blood sugar levels, ketones in the urine, and acidosis. Prompt medical attention is required to manage this condition. High blood pressure (Choice B) can be a complication of diabetes but is not as directly linked to untreated type 1 diabetes as diabetic ketoacidosis. Asthma (Choice C) and frequent infections (Choice D) are not typically associated with untreated type 1 diabetes in children.

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