Negative
Feedback
A quick Quiz
Question 1
Why is it important for living things to maintain a
relatively stable internal environment?
Question 2
What are three ways that the human body’s internal
environment may become unstable?
Question 3
What happens to our body when we are exposed
to temperature extremes?
Question 4
What do we do to control our internal environment?
Question 5
What is homeostasis?
Negative Feedback Vs. Positive
Feedback
Negative Feedback:
Push a system back to its
original equilibrium
position.
Positive Feedback:
Push a system to a state
of New Equilibrium
Draw a Negative Feedback
Loop:
Heating an Oven to 375oC
a)
b)
c)
d)
e)
f)
Heating Unit Turns off
Heating Unit Turns on
Temperature inside oven decreases
Open oven door cold air goes in
Temperature decreases because
heating unit is turned off
Temperature in Oven Rises
Negative Feedback Loop for
Osmoregulation.
Draw the Negative Feedback Loop for
Osmoregulation.
Thermoregulation
Draw the negative feedback loop for maintaining our
internal temperature?