What events take place during systole? Select all that apply.
The ventricles contract.
The ventricles relax.
The atria contract.
None of the above.
The Correct Answer is A
Choice A rationale
During systole, the ventricles contract to pump blood out of the heart to the body and lungs.
Choice B rationale
The ventricles relax during diastole, not systole.
Choice C rationale
The atria also contract during systole, but this occurs just before ventricular systole.
Choice D rationale
This choice is incorrect because both the ventricles and the atria contract during systole.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A rationale
Discharge teaching is typically a responsibility of the RN, as it often involves complex instructions and patient education.
Choice B rationale
LPNs are skilled in many technical tasks, including sterile dressing changes. This task is within the LPN’s scope of practice and does not require the advanced assessment skills of an RN56.
Choice C rationale
A bed bath and linen change are tasks that can be competently performed by Nurse Aides.
Choice D rationale
A patient complaining of new onset dizziness should be assigned to an RN. This symptom could indicate a serious condition that requires advanced assessment and critical thinking skills.
Correct Answer is D
Explanation
Choice A rationale
Respiratory acidosis is characterized by a pH less than 7.35 and a PaCO2 greater than 454. In this case, the pH is 7.43, which is within the normal range, and the PaCO2 is 46, which is slightly above the normal range. Therefore, this does not indicate respiratory acidosis.
Choice B rationale
Respiratory alkalosis is characterized by a pH greater than 7.45 and a PaCO2 less than 354. In this case, the pH is 7.43, which is within the normal range, and the PaCO2 is 46, which is slightly above the normal range. Therefore, this does not indicate respiratory alkalosis.
Choice C rationale
Metabolic acidosis is characterized by a pH less than 7.35 and a HCO3 less than 224. In this case, the pH is 7.43, which is within the normal range, and the HCO3 is 35, which is above the normal range. Therefore, this does not indicate metabolic acidosis.
Choice D rationale
Metabolic alkalosis is characterized by a pH greater than 7.45 and a HCO3 greater than 264. In this case, the pH is 7.43, which is within the normal range, and the HCO3 is 35, which is above the normal range. Therefore, this indicates metabolic alkalosis.
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