describe the role of the skin in temperature regulation, with reference to sweating vasoconstriction and vasodilation
There are many different types of sensors in the skin
The greatest number being on our fingertips
- protects skin - stops germs getting in - stops too much water loss - lets you feel, touch, pain, temperature, pressure - helps keep your body temperature constant
VASOCONSTRICTION:
Narrowing of blood vessels from contraction of muscular wall of the vessels. Thus, the flow of blood is contricted = retained body heat. Skin turns paler because less blood is reaching the surface, therefore reducing radiation of heat.
VASODILATION:
Widening of blood vessels from relaxtion of vessel walls. The flow of blood increases, decreases blood pressure.
No comments:
Post a Comment