Question

question 5
1 pts
inhibition of sympathetic vasoconstrictor impulses is considered a major mechanism of
vasoconstriction.
vasodilation.
vasopressure.
vasomotor control.

question 6
1 pts
cardiac output is determined by
stroke volume and blood pressure.
heart rate and blood pressure.
stroke volume and heart rate.
stroke volume and peripheral resistance.

Explanation:

Question 5

Sympathetic vasoconstrictor impulses cause blood vessels to narrow (vasoconstriction). Inhibiting these impulses would have the opposite effect. Vasodilation is the widening of blood vessels. Vasopressure is related to blood pressure maintenance in a general sense but not specifically the direct opposite of vasoconstrictor impulse inhibition. Vasomotor control is a broader term for regulating blood vessel tone.

Cardiac output ($CO$) is calculated by the formula $CO=\text{Stroke Volume (SV)}\times\text{Heart Rate (HR)}$. Blood pressure is affected by cardiac output but is not a component in determining it. Peripheral resistance affects blood pressure and is not part of the direct formula for cardiac output.

Answer:

vasodilation.

Question 6