Homeostasis
- Created by: Molly Webb
- Created on: 16-02-16 11:37
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- Homeostasis and Communic.
- Responding to the environment
- Animals respond to changes in their external environment
- Respond to changes in their internal environment
- Detect the stimuli and are specific to one particular stimulus
- Communicate with effectors via the nervous system or hormonal system or both
- Detect the stimuli and are specific to one particular stimulus
- Respond to changes in their internal environment
- Animals respond to changes in their external environment
- Homeostasis
- Maintenance of a constant internal environment despite changes in the external environment
- This keeps cells functioning properly and stops them becoming damaged
- Maintain core body temp
- Temperature affects enzyme activity
- Enzymes control rate of metabolic reactions
- Temperature affects enzyme activity
- Maintain glucose concentration
- So there is enough for respiration
- Negative Feedback System
- Effectors counteract any change and bring levels back to normal
- Only works within certain limits- if the change is too big effectors may not be able to counteract it
- Effectors counteract any change and bring levels back to normal
- Maintenance of a constant internal environment despite changes in the external environment
- Responding to the environment
- Stimuli
- Receptors
- Cell Signalling
- Not homeostasis because it doesn't involve keeping internal environment constant
- Examples
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