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Control Systems
The human body has thousands of control
systems also known as compensatory
mechanisms. These control systems are
important to maintain homeostasis. Most of
these control systems involve negative
feedback.
Negative Feedback
• Occurs when the output of a system acts to
oppose changes to the input of the system,
with the result that the changes are attenuated.
If the overall feedback of the system is
negative then the system will be stable.
Biology → Homeostasis
Mechanics → Equilibrium
Negative Feedback
Negative Feedback
Positive Feedback
• Acts to increase the magnitude of a response or
disturbance.
• Often referred to as a viscous cycle or runaway.
• Amplification
Positive Feedback
Biological Examples:
• Childbirth
• Blood clotting
• Lactation
• Generation of a nerve signal
Positive Feedback
Feedback Loops
• Provide an ideal method to assist with the
understanding biological processes.
• Provide an ideal method to understand
compensatory mechanisms.
• Provide an ideal method to fully appreciate the
complexity homeostasis and amplification.

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Control Systems and Homeostasis

  • 1. Control Systems The human body has thousands of control systems also known as compensatory mechanisms. These control systems are important to maintain homeostasis. Most of these control systems involve negative feedback.
  • 2. Negative Feedback • Occurs when the output of a system acts to oppose changes to the input of the system, with the result that the changes are attenuated. If the overall feedback of the system is negative then the system will be stable. Biology → Homeostasis Mechanics → Equilibrium
  • 5. Positive Feedback • Acts to increase the magnitude of a response or disturbance. • Often referred to as a viscous cycle or runaway. • Amplification
  • 6. Positive Feedback Biological Examples: • Childbirth • Blood clotting • Lactation • Generation of a nerve signal
  • 8. Feedback Loops • Provide an ideal method to assist with the understanding biological processes. • Provide an ideal method to understand compensatory mechanisms. • Provide an ideal method to fully appreciate the complexity homeostasis and amplification.