BIOLOGY KEYWORDS

Mass transport

Substances are transported in a mass of fluid with a mechanism for moving fluid around the body

Water potential (KPA)

Pressure exerted by free water molecules

Buffer

Keeps PH relatively constant

Vasodilation of arterioles to lose heat

1) Smooth muscle of Arteriole Vasodilates, widens the lumen

2)More blood flows to the surface of the skin

3)More heat is lost from the skin surface via radiation, Convection reverses the body temperature back to a set point (Negative feedback)

Vasoconstriction of arterioles to conserve heat

1)Smooth muscle of Arteriole Vasoconstriction, narrows the lumen

2) Less blood flows to the surface of the skin

3)Less heat is lost from the skin surface via radiation, Convection reverses the body temperature back to a set point (Negative feedback)