Which of the following factor(s) increase blood pressure?

Increase of cardiac output

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Constriction of blood vessel

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Increase of blood volume

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All of the above

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Solution

The correct option is C All of the above
Increased cardiac output increases the blood pumped from ventricles per minute and thereby increase the blood volume in major blood vessels. Increased blood volume causes an increase in blood pressure. Sympathetic nervous system stimulates constriction of blood vessels and thereby, increases the blood volume. The parasympathetic nervous system causes widening of blood vessels and thereby, lowers down the blood pressure. Thus, the correct answer is option D.

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