The nurse preceptor is teaching a newly licensed nurse about blood flow through the heart.
The nurse preceptor knows teaching has been effective when the newly licensed nurse states that the upper chambers of the heart are:.
The thickest part of the heart.
Where blood leaves.
Where blood enters.
Called ventricles.
The Correct Answer is C
Choice A rationale:
The thickest part of the heart is not the upper chambers but the lower chambers, specifically the left ventricle. This is because it needs to pump blood to the entire body.
Choice B rationale:
Blood leaves the heart through the lower chambers, or ventricles, not the upper chambers.
Choice C rationale:
Blood enters the heart through the upper chambers, or atria. This is where deoxygenated blood from the body and oxygenated blood from the lungs first enter the heart.
Choice D rationale:
The term “ventricles” refers to the lower chambers of the heart, not the upper chambers.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A rationale:
Hyperventilation is a compensatory mechanism for metabolic acidosis, not a cause. It helps to eliminate carbon dioxide, a weak acid, to balance the pH.
Choice B rationale:
Diarrhea causes loss of bicarbonate, a base, from the body. This can lead to metabolic acidosis as there is an excess of acids.
Choice C rationale:
Salicylate intoxication can cause both respiratory alkalosis and metabolic acidosis. However, it is not the most common cause of metabolic acidosis.
Choice D rationale:
Vomiting leads to loss of gastric acid, a strong acid. This usually results in metabolic alkalosis, not acidosis.
Correct Answer is B
Explanation
Choice A rationale:
Urine specific gravity 1.020 is within the normal range (1.005-1.030), so it does not indicate fluid volume deficit.
Choice B rationale:
Urine output 15 mL/hr is less than the normal minimum of 30 mL/hr, indicating fluid volume deficit.
Choice C rationale:
Hct 43% is within the normal range (38.8-50.0 for men, 34.9-44.5 for women), so it does not indicate fluid volume deficit.
Choice D rationale:
BUN 12 mg/dL is within the normal range (7-20 mg/dL), so it does not indicate fluid volume deficit.
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