homeo

same

stasis

stay

Homeostasis

the body’s ability to maintain a relatively stable internal environment despite changes inside or outside the body.

What is Dynamic equilibrium controlled by?

feedback systems (feedback loop).

Stimulus

The condition that changes and needs to be regulated

Receptor

Detects the change in the variable/ A structure or cell that can sense the stimulus (a sensor).

Set Point

The ideal value for this particular variable.

Control Center/ Comparator

compares the current value of the variable against the set point. Communicates with the effector.

Effector

The structure, cell, tissue, or organ that can produce a change

feedback loop

a process in which the body detects a change, compares it to a desired value, and produces a response that helps regulate the variable.

1)

Stimulus

2)

Sensor

3)

Comparator

4)

Set point

5)

Normal range

6)

Response

What is changing?

Variable/stimulus.

What detects the change?

Sensor/receptor.

What decides whether the change is acceptable?

Comparator.

What value is the body trying to maintain?

Set Point.

What values are considered acceptable?

Normal Range.

What happens to correct the change?

Response.

Negative feedback

works to bring a variable back toward its normal range/set point. It helps maintain homeostasis.

Positive feedback

makes the original change stronger or greater. Instead of reversing the change, it amplifies it.