3. STIMULUS
• Stimulus is the measurable change in the environment
• This change can effect the subject
Lower temperature causes the body to increase body heat
This Photo by Unknown Author is
licensed under CC BY-SA
4. SENSOR/RECEPTOR
• The sensor monitors the levels in the body
• Receptor ensures the levels don’t drop below the control level
• They send messages to the effectors
For example nerves
5. CONTROL UNIT
• When the sensor detects a value different from the normal value it sends
information to the control unit
• The control unit decides on the response required
• The thermoregulatory unit in the hypothalamus is a prime example
6. EFFECTORS
Effectors can be muscles, glands
They process the information which is provided by the control unit
They help counteract or nullify the effect
7. FEEDBACK LOOP
• A feedback loop is a biological occurrence wherein the output of a system
amplifies the system (positive feedback) or inhibits the system (negative
feedback). Feedback loops are important because they allow living organisms
to maintain homeostasis
Feedback either enhances or inhibits the system
8. NEGATIVE FEEDBACK
• Most organisms use a negative feedback in order to balance their homeostasis
• Negative feedback loops involve 3 components
• The receptor detects the stimulus
• A coordination system usually between the nervous system and endocrine system
• An effector carries out the action
9.
10. POSITIVE FEEDBACK
• Positive feedback increases the effect of the stimulus
• It focuses on completion rather than achieving equalty
11. APPLICATIONS AND IMPORTANCE
• Homeostasis helps maintain optimal levels for the body to function efficiently
• The metabolic process is also controlled by the homeostasis
12. IMPORTANCE AND APPLICATIONS
• An imbalance in the homeostasic system can be fatal
It is also used in restoration of the immune system during sepsis
