Feedback Systems

Question 0

Distinguish between positive and negative feedback with an example for each.

Answer 0

Positive - change occurs in the direction of the stimulus. Eg: childbirth.
Negative - change occurs in completely opposite direction the stimulus. Eg: body temperature.

Question 1

List the parts of a feedback loop and describe what each does.

Answer 1

Stimulus - causes change in the bodies environment.
Receptor - senses change in homeostatic environment.
Modulator - interprets message and sends to effector.
Effector - carries out the response.
Response - changer that occurs to maintain homeostasis.
Feedback - modifies/changes the stimulus.

Question 2

Which of the two feedback systems is most common in the body?

Answer 2

Negative because it is used to maintain homeostasis.

Question 3

What is a steady state system?

Answer 3

The response is the same as the stimulus, it maintains homeostasis.