When the body is cold, small arteries in the skin constrict to minimize heat loss true or false

true

Explanation:

To prevent heat loss blood vessels shrink so that less heat is sent to the skin and so that more is sent towards vital organs i.e. the heart, brain, lungs.

the solute can move "downhill," from regions of higher to lower concentration, relying on the specificity of the protein carrier to pass through the membrane. this process is called passive transport or facilitated diffusion, and does not require energy.