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This lesson covers the structure and function of neurones and the mechanism of nerve impulse transmission as required by the Edexcel A-Level Biology specification (9BI0), Topic 9 -- Control Systems. You need to understand the types of neurones, the resting potential, and the action potential in detail.
The nervous system is divided into two main parts:
| Division | Components | Function |
|---|---|---|
| Central Nervous System (CNS) | Brain and spinal cord | Processing and integration of information |
| Peripheral Nervous System (PNS) | Sensory and motor neurones | Carries impulses to and from the CNS |
The PNS is further divided into:
The autonomic nervous system has two branches:
There are three main types of neurone:
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