Question

as cardiac output increases, blood pressure ____________. a increases. b decreases. c doesnt necessarily change.

Explanation:

Blood pressure is influenced by multiple factors including cardiac output and peripheral vascular resistance. The formula for mean arterial pressure (a measure of blood pressure) is \( \text{MAP}=\frac{2 \times \text{Diastolic BP}+\text{Systolic BP}}{3}\), and also \( \text{MAP}=\text{Cardiac Output} \times \text{Total Peripheral Resistance}\). If cardiac output increases, but total peripheral resistance decreases proportionally, blood pressure may not change. However, if total peripheral resistance remains constant or increases, blood pressure will increase. So, just an increase in cardiac output alone doesn't guarantee a change in blood pressure as other factors are at play.

Answer:

C. doesn't necessarily change.