Match the physiological change with its effect on mean arterial pressure:Increased peripheral resistanceAnswer 1 Question 4Decreased heart rateAnswer 2 Question 4Decreased cardiac outputAnswer 3 Question 4Vasodilation of arteriolesAnswer 4 Question 4
Question
Match the physiological change with its effect on mean arterial pressure:Increased peripheral resistanceAnswer 1 Question 4Decreased heart rateAnswer 2 Question 4Decreased cardiac outputAnswer 3 Question 4Vasodilation of arteriolesAnswer 4 Question 4
Solution 1
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Increased peripheral resistance: This would increase the mean arterial pressure. The peripheral resistance is the resistance of the arteries to blood flow. As the arteries constrict, the resistance increases and as they dilate, resistance decreases. Therefore, if the peripheral resistance increases, the blood pressure would also increase.
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Decreased heart rate: This would decrease the mean arterial pressure. The heart rate is the number of times the heart beats per minute. If the heart rate decreases, the amount of blood that is pumped by the heart per minute (cardiac output) also decreases. This would lead to a decrease in the mean arterial pressure.
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Decreased cardiac output: This would also decrease the mean arterial pressure. The cardiac output is the volume of blood pumped by the heart per minute. If the cardiac output decreases, the mean arterial pressure would also decrease because there is less blood being pushed through the arteries.
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Vasodilation of arterioles: This would decrease the mean arterial pressure. Vasodilation refers to the widening of blood vessels. When the arterioles dilate, the resistance to blood flow decreases, which would lead to a decrease in the mean arterial pressure.
Solution 2
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Increased peripheral resistance: This would increase the mean arterial pressure. The peripheral resistance is the resistance of the arteries to blood flow. As the arteries constrict, the resistance increases and as they dilate, resistance decreases. Therefore, an increase in peripheral resistance would lead to an increase in mean arterial pressure.
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Decreased heart rate: This would decrease the mean arterial pressure. The heart rate is the number of times the heart beats per minute. If the heart rate decreases, less blood is pumped by the heart, which can lead to a decrease in the mean arterial pressure.
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Decreased cardiac output: This would also decrease the mean arterial pressure. Cardiac output is the amount of blood the heart pumps through the circulatory system in a minute. If the cardiac output decreases, less blood is being pumped, which can lead to a decrease in the mean arterial pressure.
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Vasodilation of arterioles: This would decrease the mean arterial pressure. Vasodilation is the widening of blood vessels. When the arterioles dilate, the resistance to blood flow decreases, which can lead to a decrease in the mean arterial pressure.
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