The following is an example of __________________________. D…

The following is an example of __________________________. During exercise, one generates excess heat and the body temperature rises. As a response, blood vessels dilate in the skin, warm blood flows closer to the body surface.  Heat is lost and homeostatic body temperature remains.

Read the following example: Sensors inside the blood vessels…

Read the following example: Sensors inside the blood vessels measure that blood pressure has increased higher than normal limits.  These sensors then conduct this information about blood pressure to the brain.  The brain then sends a message to the heart muscle to decrease its rate and blood vessel muscles to increase their diameter.  This action returns the blood pressure to normal limits. In the example, the heart and its muscle is an ____________.