Which of the following will raise blood pressure?
Vasodilation
Increased cardiac output
Decreased heart rate
Parasympathetic stimulation
The Correct Answer is B
A. Vasodilation refers to the widening of blood vessels, which typically lowers blood pressure by decreasing the resistance within the vessels.
B. Increased cardiac output means the heart pumps more blood per minute, which raises blood pressure by increasing the volume of blood circulating through the arteries. This is the correct answer.
C. Decreased heart rate would typically lower blood pressure, as the heart is pumping less frequently, reducing the force exerted on the blood vessels.
D. Parasympathetic stimulation generally lowers blood pressure as it promotes relaxation and reduces the heart rate, which in turn reduces cardiac output.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. When the inspiratory muscles contract, the length of the thoracic cavity actually increases, not decreases, as the diaphragm moves downward and the ribs expand.
B. When the diaphragm contracts (during inspiration), it moves downward into the abdomen, not upward.
C. The correct action is that the contraction of the inspiratory muscles (including the diaphragm and external intercostals) increases the diameter of the thoracic cavity, allowing for the expansion of the lungs to draw in air.
D. The chest cavity does not compress the lungs during inspiration; rather, it allows for the lungs to expand as air is drawn in.
Correct Answer is D
Explanation
A. Expiratory reserve volume is the amount of air that can be exhaled forcefully after normal expiration. It does not refer to the air moved in and out during the normal respiratory cycle.
B. Residual volume is the amount of air remaining in the lungs after a forced exhalation. It cannot be exhaled and is not part of the normal respiratory cycle.
C. Vital capacity is the maximum amount of air that can be exhaled after a maximum inhalation, which includes tidal volume, expiratory reserve volume, and inspiratory reserve volume. It does not specifically refer to the air moved in and out during normal breathing.
D. Tidal volume refers to the amount of air that is moved into and out of the lungs during a normal, relaxed breath. It is the term that directly describes the air exchanged during the normal respiratory cycle.
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