thermoregulation (warm conditions)

Question 1

vasodilation

Answer 1

skin arterioles dilate and by-pass arterioles constricts, more blood flows to skin surface, increased heat loss by radiation

Question 2

sweating

Answer 2

sweat gland produces more sweat, more evaporation of sweat from skin surface, increased heat loss through latent heat of vaporization

Question 3

hair erector muscles

Answer 3

hair erector muscles relax, hair lay flat, less air is retained against the skin, increased heat loss by conduction/convection