Blood flow through a capillary is controlled by a precapillary sphincter, which opens or closes due to the requirements of the cells supplied by the capillary.

Question

Quizplus · Accepted Answer

This statement is true. Precapillary sphincters are muscles that regulate blood flow by constricting or relaxing the capillaries. They respond to the needs of the cells they serve, allowing for the selective delivery of nutrients and removal of waste products.

Blood Flow Through a Capillary Is Controlled by a Precapillary