Negative Feedback (Grade 12 NSC Matric Life Sciences): Flashcards
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Negative feedback definition
Negative feedback definition
Control mechanism maintaining balance like a thermostat
Homeostasis definition
Homeostasis definition
Internal balance
Receptors function
Receptors function
Detect changes in body's internal environment
Control centre location
Control centre location
Usually in the brain
Effectors definition
Effectors definition
Target organs responsible for making changes
Effectors' action in negative feedback
Effectors' action in negative feedback
Oppose or reverse the original imbalance
3 variables controlled by homeostasis
3 variables controlled by homeostasis
Water, glucose, body temperature
Organs regulating water levels
Organs regulating water levels
Kidneys and skin
Organ regulating salt levels
Organ regulating salt levels
Kidneys
Core principle of negative feedback
Core principle of negative feedback
Opposes change - increase triggers decrease & vice versa