brain nervous system
Overview
This lesson explores the intricate structure and function of the human brain and nervous system, the body's primary control and communication network. We will delve into the roles of different brain regions, the types of neurons, and how nerve impulses are generated and transmitted to coordinate bodily functions and responses.
Overview of the Nervous System
The nervous system is a complex network of nerves and cells that carry messages to and from the brain and spinal cord to various parts of the body. It is broadly divided into two main parts: the **Central Nervous System (CNS)** and the **Peripheral Nervous System (PNS)**. * **Central Nervous Syst...
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Key Concepts
- Central Nervous System (CNS): Comprises the brain and spinal cord, responsible for processing information and issuing commands.
- Peripheral Nervous System (PNS): Consists of nerves extending from the CNS, connecting it to the rest of the body.
- Neuron: The fundamental unit of the nervous system, specialised for transmitting electrical and chemical signals.
- Synapse: The junction between two neurons where information is transmitted via neurotransmitters.
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Exam Tips
- →Practice drawing and labelling diagrams of neurons and the major brain regions. Understand the function associated with each labelled part.
- →Be able to explain the 'all-or-nothing' principle of action potentials and the role of the refractory period in ensuring unidirectional transmission.
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