the first step in the scientific method is to

ATI RN

ATI Nutrition Practice A

1. What is the first step in the scientific method?

A. Conduct an experiment
B. Make an observation and ask a question
C. Formulate a hypothesis
D. Reach a consensus

Correct answer: B

Rationale: The first step in the scientific method is to make an observation and ask a question. This is because the scientific method is a systematic process of investigation that begins with observing a phenomenon or asking a question about it. This is followed by formulating a hypothesis (Choice C), designing and conducting an experiment to test the hypothesis (Choice A), and analyzing the results to reach a consensus or conclusion (Choice D). Therefore, choices A, C, and D are incorrect as they represent steps that occur after the initial observation and question.

2. Can a person with Celiac disease eat Poptarts that contain gluten?

A. Yes
B. No
C. Only in small quantities
D. Only if they are gluten-free Poptarts

Correct answer: B

Rationale: A person with Celiac disease cannot consume Poptarts that contain gluten because gluten is a protein found in wheat, barley, and rye, triggering an autoimmune response in individuals with Celiac disease and damaging their small intestine. Even small quantities of gluten can lead to this harmful response, making choices 'A' and 'C' incorrect. While gluten-free Poptarts may be suitable for individuals with Celiac disease, regular Poptarts containing gluten are not safe for consumption by them, rendering choice 'D' incorrect as well.

3. What is the most likely demonstration of cardiac cachexia?

A. Decreased physical activity
B. Weight loss and tissue wasting
C. Poor urine output and tissue edema
D. Cardiac arrhythmia and wet lung sounds

Correct answer: B

Rationale: Cardiac cachexia is a condition characterized by severe weight loss and tissue wasting. This typically occurs in patients suffering from heart failure due to an increased energy expenditure and reduced appetite, which is why choice B is the correct answer. The other choices are incorrect as they do not accurately describe the symptoms of cardiac cachexia. Decreased physical activity (choice A) can be a result of many conditions, not specifically cardiac cachexia. Poor urine output and tissue edema (choice C) are more indicative of kidney problems rather than cardiac cachexia. Finally, cardiac arrhythmia and wet lung sounds (choice D) are symptoms related to other cardiac conditions, not specifically to cardiac cachexia.

4. A nurse is caring for a client with a thiamine deficiency. Which assessment findings will the nurse expect?

A. Tachycardia, muscle weakness, and lack of coordination
B. Swollen lips, cracks in the corners of the mouth, and glossitis
C. Neuropsychiatric symptoms of delusions and hallucinations
D. Scaly rash on arms, dementia, and diarrhea

Correct answer: A

Rationale: Thiamine deficiency, also known as Vitamin B1 deficiency, can present with various symptoms. Tachycardia, muscle weakness, and lack of coordination are classic signs of thiamine deficiency due to its role in energy metabolism. Swollen lips, cracks in the corners of the mouth, and glossitis are more indicative of a deficiency in riboflavin (Vitamin B2). Neuropsychiatric symptoms of delusions and hallucinations are characteristic of niacin (Vitamin B3) deficiency. A scaly rash on the arms, dementia, and diarrhea are not typically associated with thiamine deficiency. Therefore, the correct assessment findings for a client with thiamine deficiency are tachycardia, muscle weakness, and lack of coordination.

5. What does oliguria lead to in patients with acute kidney injury?

A. Hypophosphatemia and overgrowth of bone tissue
B. An increase in blood potassium levels due to excessive excretion of parathyroid hormone
C. Sodium retention and elevated levels of potassium
D. Edema due to increased urine production

Correct answer: C

Rationale: In patients with acute kidney injury, oliguria (reduced urine output) often results in sodium retention and hyperkalemia (elevated levels of potassium). This is due to the kidneys' decreased capacity to excrete these substances. Choice A is incorrect because hypophosphatemia and overgrowth of bone tissue are not direct consequences of oliguria in acute kidney injury. Choice B is incorrect because an increase in blood potassium levels is not caused by excessive excretion of parathyroid hormone but rather by decreased excretion of potassium. Choice D is incorrect because edema is not caused by increased urine production but rather by fluid overload due to decreased urine output.