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Feedback Mechanisms (Positive or Negative Feedback )
Course: Biology (Bio2233)
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Students shared 149 documents in this course
University: Abraham Lincoln University
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Feedback Mechanisms
How do organisms regulate complex systems through chemical interactions?
Why?
The heating system of a house works to keep the temperature constant. If the house gets too cold, then
the heat automatically turns on to warm the house. The heat stops when the preset temperature is
reached. This is an example of afeedback mechanism. Organisms use many feedback mechanisms to
either maintain or amplify important chemical systems. This could happen at a molecular level to
coordinate the function of a single enzyme or it could happen throughout the body to regulate the
organism’s internal temperature.
Model 1 – Positive and Negative Feedback
1. What two types of feedback mechanisms are illustrated in Model 1?
Positive and negative feedback
2. Define the words below as they are used in everyday language.
a. Stimulus
An increase
b. Signal
Communicating, letting something/someone else know
c. Response
Reaction after knowing/doing something
d. Identify at least three similarities in the two types of feedback mechanisms
in Model 1.