Homeostasis

Homeostasis

The body maintains a steady state, through a series of monitored adjustments

Homeostasis is a process by which a constant internal environment is maintained despite changes in the external environment

Blood Sugar

Tolerance Ranges

Homeostatic Systems• 3 Components:

– Monitor: special sensors– Coordinating centre: relays information to

appropriate regulator– Regulator: helps restore normal balance

Example – Exercising

Feedback Systems

Negative Feedback vs. Positive Feedback

Negative FeedbackProcess by which a mechanism is activated to restore

conditions to their original state

Positive FeedbackProcess by which a small effect is amplified

Ex: the contractions in child birth caused by the release of oxytocin

Explain in your own words the concept of homeostasis

Differentiate between positive and negative feedback

Create a flow chart for the exercise activity

Homework

• Research what the lower and upper limits are for 2 of the following and what happens to the body when we go outside the limits.

– Body temperature– Blood sugar– Blood pH– Systolic blood pressure