What variable(s) can the cardiovascular system alter to maintain blood pressure?Question 10Select one:A.resistanceB.heart rateC.stroke volumeD.heart rate, stroke volume and resistance
Question
What variable(s) can the cardiovascular system alter to maintain blood pressure?Question 10Select one:A.resistanceB.heart rateC.stroke volumeD.heart rate, stroke volume and resistance
Solution
The cardiovascular system can alter several variables to maintain blood pressure. These include:
A. Resistance: This refers to the opposition to blood flow due to friction between the blood and the walls of the blood vessels. The cardiovascular system can increase resistance by constricting blood vessels, and decrease it by dilating blood vessels.
B. Heart Rate: This is the number of times the heart beats per minute. The cardiovascular system can increase heart rate to increase blood pressure, and decrease it to lower blood pressure.
C. Stroke Volume: This is the amount of blood pumped by the left ventricle of the heart in one contraction. The cardiovascular system can increase stroke volume to increase blood pressure, and decrease it to lower blood pressure.
D. Therefore, the correct answer is D. Heart rate, stroke volume, and resistance. All these variables can be altered by the cardiovascular system to maintain blood pressure.
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