Vasomotor Control Flashcards
Redistribution of blood during exercise is achieved by…
Blood shunting - dilation and constriction of arterioles that supply blood to capillary networks
Ring of muscle (pre-capillary sphincter) in the arterioles before the capillaries can…
Contract and relax altering the size of the lumen
During exercise sympathetic nervous system stimulates arterioles and precapillary sphincter to…
Vasodilate in working muscles and vasoconstrict where blood is not needed)
After exercise parasympathetic nervous system stimulates arterioles and precapillary sphincter to…
Vasoconstrict where not needed and vasodilator where needed (organs)
Happens gradually
Vasodilation also occurs in…
Skin
Vasomotor control is …
Located in the medulla
Controls vasodilation and vasoconstriction
