<prompt> Systolic BP is directly proportional to:Compliance of vessel wallStroke volumeRadius of vesselElasticity.  <response>: Ans: b Stroke volume. Ref: Ganong, 22nd ed, p. 590Arterial pressure is the product of cardiac output and peripheral resistance. But remember cardiac output stroke volume toeart rate.i.e., BP stroke volume toeart rateperipheral resistance.BP a stroke volume.Systolic BP SBP Is the highest pressure during cardiac cycle, occurs in systole.It depends on:Stroke volume SV - As SV increases, SBP increases.Compliance of vessel - As compliance decreases, SBP increases windkessel effect, e.g.. old ageDiastolic BP DBP is the lowest pressure during cardiac cycle: occurs during diastole.It depends on:Peripheral resistance- As PR increases, DBP increasesMean Arterial Pressure MAP average pressure during cardiac cycle.MAPSBP 3 23DBPorMAP DBP 13 PPPSBP-DBPSome important values from respiratory system 