Question

where does blood exert the force measured as systolic blood pressure? on the arterial walls during ventricular contraction on the venous walls during ventricular contraction on the arterial walls during ventricular relaxation on the venous walls during ventricular relaxation

Explanation:

Systolic blood pressure is the pressure exerted on arterial walls when the heart's ventricles contract and pump blood out into the arteries. Venous walls are not involved in measuring systolic blood - pressure. Ventricular relaxation is related to diastolic blood pressure.

Answer:

On the arterial walls during ventricular contraction