This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Physiology
Blood pressure is defined as the product of: 
Select and explain. 
A. Systolic pressure x pulse, B. Diastolic pressure x pulse rate, C. Pulse pressure x pulse rate, D. Cardiac output x peripheral resistance
D: Cardiac output x peripheral resistance
Answer: D: Cardiac output x peripheral resistance 
Explanation: D i.e. Peripheral resistance x cardiac output The overall blood flow in circulation of adult at rest is about 5 liter/min which equals to cardiac output because it is the amount of blood pumped by hea per unit time. So Blood pressure = Cardiac output x peripheral resistanceQ or Blood flow (Q) x resistance (R) Venous returnQ = MSFP -- RAP MSFP = Mean systemic filling pressure = Right RAP atrial pressure RVR RVR = Resistance to venous return