BRAINCAKEFeedback Systems
Homeostatic control relies on feedback systems. A feedback system is a control loop in which the result of a response affects the process that caused it.
Every feedback system has the same basic parts:
- Stimulus: a change in a variable away from the set point.
- Receptor: detects the change, for example thermoreceptors in the skin or hypothalamus.
- Control centre (coordinator): compares the information with the set point and decides on a response, for example the hypothalamus or the islets of Langerhans in the pancreas.
- Effector: a muscle or gland that carries out the response.
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More in Chemical Control
- Homeostasis
- Negative Feedback
- Positive Feedback
- Chemical Control
- Endocrine Glands
- Hormone Release System
- Pituitary Gland
- Second Messenger System
All 30 lessons in Chemical Control · All Edexcel A-level Biology topics