The vasomotor center

A) regulates the expansion of elastic arteries.
B) controls the contraction and relaxation of precapillary sphincter muscles.
C) increases the strength of heart muscle contraction under low O₂ conditions.
D) sends low frequency action potentials to blood vessels to maintain tone.

Vasomotor Center

A region in the medulla oblongata of the brain that regulates blood pressure by controlling the dilation and constriction of blood vessels.

Elastic Arteries

Large arteries that contain elastic tissue in their walls, enabling them to stretch and recoil for blood flow regulation.

Precapillary Sphincter

A band of smooth muscle that regulates blood flow into the capillaries, largely controlling the microcirculation.