A Direct Connection Between an Arteriole and a Venule Without

Question

A direct connection between an arteriole and a venule without an intervening capillary bed is a(an)
A) venous sinus.
B) arteriovenous anastomosis.
C) metarteriole.
D) arterial capillary.

Accepted Answer

An arteriovenous anastomosis is a direct connection between an arteriole and a venule without an intervening capillary bed. This type of vessel plays a role in thermoregulation by allowing blood to bypass capillaries and increase blood flow to the skin surface for heat loss. Venous sinus refers to a wide, low-pressure area within a tissue or organ. Metarteriole is a short vessel that directly connects an arteriole to a capillary bed. Arterial capillary refers to the smallest blood vessels that allow for exchange of nutrients and waste products between blood and tissues.