Homeostasis

Homeostasis

+ Positive Feedback
1. Enhance stimulus
2. E.g. Child birth & blood clotting
- Negative Feedback
1. Reverse stimulus
2. E.g. Maintaining body temp & blood glucose levels
Stimulus
1. Receptor
  1. Control centre
    1. Effector
      1. Physiological response
        Evaporation of sweat, body temp falls, stimulus ends
      2. Responds to change
        E.g. Sweat glands activated
    2. Efferent pathway
      1. Info sent from control centre to effector
    3. Measures change against set point
      1. E.g. Thermoregulatory centre in brain
  2. Afferent pathway
    1. Info sent from receptor to control centre
  3. Detects change
  4. E.g. Temp-sensitive cells in skin & brain
2. Produces change
3. E.g. Body temp rises
Maintain balance
1. Optimal functioning
  1. Internal environment

Resource summary

	Created by Cushla Whetton about 6 years ago