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 the primary source of energy for the brain and nervous system?

Correct answer: D

Rationale: Glucose is the correct answer as it is the primary source of energy for the brain and nervous system. The brain relies heavily on glucose to function optimally. While protein and fat play essential roles in the body, they are not the primary sources of energy for the brain and nervous system. Carbohydrates, on the other hand, are broken down into glucose, which is then used as fuel by the brain and nervous system.

3. What role do fats play in the human body?

Correct answer: D

Rationale: Fats play various essential roles in the human body, one of which is aiding in the digestion of food. While fats do provide a concentrated source of energy, the primary source is carbohydrates. Proteins are the building blocks of enzymes and hormones, not fats. Essential fatty acids found in fats are vital for brain function and development, but this is not the primary role of fats in the body.

4. How should a healthcare provider approach the care of a child with a suspected fracture?

Correct answer: A

Rationale: When a child is suspected to have a fracture, it is essential to immobilize the affected limb to prevent further injury. Seeking immediate medical evaluation is crucial for an accurate diagnosis and appropriate treatment. Applying heat to a suspected fracture can worsen the condition by increasing swelling and pain. Allowing the child to continue normal activity can lead to further damage. Administering only over-the-counter pain relief is insufficient and does not address the need for immobilization and professional evaluation.

5. What is a primary goal in managing a child with asthma?

Correct answer: B

Rationale: The primary goal in managing a child with asthma is to achieve and maintain control of asthma symptoms to ensure the child's well-being and quality of life. This involves using appropriate medications as prescribed, identifying and avoiding triggers, and developing an asthma action plan. Choices A, C, and D are incorrect because avoiding all physical activities can lead to deconditioning and is not recommended, increasing daily sugar intake is unrelated to managing asthma, and restricting all forms of medication can be harmful as medications are often necessary to control asthma symptoms.

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