Mean arterial pressure (MAP) is determined by:

a. all of the choices are correct

b. resistance of the arterioles

c. total blood volume

d. heart rate

e. cardiac output

Therefore, the mean arterial pressure is determined by e. cardiac output and b. resistance of the arterioles

Explanation:

Mean arterial pressure (MAP) is the average blood pressure of an individual during a particular cardiac cycle. It can be determined by cardiac output (CO), central venous pressure (CVP) and the systemic vascular resistance (SVR).

Therefore, the Mean arterial pressure can be calculated by:

systemic vascular resistance = (Mean Arterial Pressure - central venous pressure) / Cardiac Output

SVR = (MAP - CVP) / CO

or,

MAP = (CO * SVR) + CVP

Since, CVP is generally 0 mmHg, the equation can be simplified to:

MAP approx = CO * SVR