The beginning of a true capillary is surrounded by a precapillary sphincter. The opening and closing of precapillary sphincters is controlled by__________ .

Question

Quizplus · Accepted Answer

The opening and closing of precapillary sphincters are primarily controlled by local chemical conditions, such as oxygen and carbon dioxide levels, pH, and temperature, rather than by the nervous system or blood pressure directly. This allows for the regulation of blood flow to tissues based on their metabolic needs.

The Beginning of a True Capillary Is Surrounded by a Precapillary