Thermoregulation

Homeostasis

L.G. Explain how thermoregulation takes place with reference to the skin, hypothalamus, blood vessels and negative feedback.

The conditions inside the body must be controlled within narrow limits. These conditions include water content, ion content, body temperature, and blood glucose consentration.

Hot:

• Hair Flat

• Sweating

• Vasodilation

Cold:

• Hair Stands Up

• Shiver

• Vasoconstriction

Negative Feedback: A change is defected by receptors, and then effectors return the system to its original state.

Positive Feedback: The corrective mechanism stays on, which causes the system to deviate even more from the original level.