Homeostasis and the human nervous system
- Created by: Abc312
- Created on: 04-06-18 20:34
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- Homeostasis and the human nervous system
- Homeostasis
- Maintaining optimal conditions for cell functions
- In the human body this includes control of
- Blood glucose concentration
- Body temperature
- Water levels
- These automatic control systems include chemical or nervous responses
- All control systems include
- Receptor cells
- Which detect stimuli
- Coordination centers
- Receive and process information
- Effectors, muscles or glands
- Bring about responces
- Receptor cells
- Structure
- Information passes from receptors
- Along cells (neurones)
- To the CNS
- This is the brain and spinal cord
- This coordinates the response which could be muscles contracting or releasing hormones
- To the CNS
- Along cells (neurones)
- It travels as electrical impulses
- Information passes from receptors
- Reflex arc
- Unconscious actions
- Stop you getting hurt
- This means they are quicker than usual responces
- When a stimulus is detected by receptors
- Impulses are sent along a sensoryneurone
- Then via a relay neurone in the CNS
- Through a motor neurone
- To the effector
- Through a motor neurone
- Then via a relay neurone in the CNS
- Impulses are sent along a sensoryneurone
- When the chemicals reach a synapse between the neurones:
- Chemicals are released at the end of the first neurone
- They diffuse across the gap
- This then continues the impulse through the next neurone.
- They diffuse across the gap
- Chemicals are released at the end of the first neurone
- Unconscious actions
- Homeostasis
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