Match the terms, labelled a. through d., with the correct characteristics.
-local arteriolar mechanisms that are aimed at keeping tissue blood flow fairly constant in spite of rather wide deviations in mean arterial driving pressure

Question

Quizplus · Accepted Answer

Pressure autoregulation is the local arteriolar mechanism that keeps tissue blood flow constant despite changes in mean arterial pressure.

Answer: D 
 Extrinsic control refers to the regulation of blood flow by external factors such as hormones or the nervous system, as opposed to local mechanisms like pressure autoregulation.

Answer: A 
 Reactive hyperemia refers to the increase in blood flow that occurs after a period of reduced blood flow, such as when a tourniquet is removed. This is not a mechanism that keeps blood flow constant.

Answer: B 
 Active hyperemia refers to the increase in blood flow that occurs in response to an increase in metabolic activity in a tissue. While this can help to regulate blood flow, it is not a mechanism that keeps blood flow constant.

Match the Terms, Labelled A