1. homeo = same stasis = standing
Homeostasis
homeo = same
stasis = standing

2. Homeostasis -
dynamic state of equilibrium or balance (in which internal conditions vary within relatively narrow ranges)
In general, the body is said to be in homeostasis when its cells’ needs are adequately met and functional activities are occurring smoothly.

5. Homeostasis is so important that most disease is regarded as a result of its disturbance.

7. How can our bodies maintain a constant state of equilibrium?
24 / 7

9. 3 Independent Parts of Control Mechanisms
control center - which determines a set point to be maintained
analyzes input and determines response
receptor - sensor that responds to stimuli
sends message to control center
effector - provides means for control center to cause a response

10. Negative Feedback
control mechanism that causes the variable to change in the direction opposite to that of the initial change
98.6°F

13. Negative Feedback
Glucose

14. Positive Feedback
the response mechanism enhances the original stimulus so that the activity is accelerated
usually controls only infrequent events
can race out of control and are rarely used in normal body functions