The Spinal Cord is..?
A “super highway” for all information/messages going to and leaving the brain.
What is a neuron?
A cell that sends and receives information in the form of a neural impulses (electrochemical energy).
What are the different types of neurons?
- Sensory.
- Motor.
- Interneurons.
Sensory Neurons.
Part of Somatic nervous system.
Afferent - sends messages to the central nervous system from our sensory organs, such as the eye.
Motor Neurons.
Part of Somatic nervous system
Efferent - sends messages from the central nervous system to the body (muscles or glands).
Interneurons.
Located in the central nervous system.
Relays messages from sensory neuron to motor neuron. - known as the link between sensory and motor neurons.
What are the different parts of a neuron?
- Dendrites.
- Cell body (soma).
- Nucleus
- Axon.
- Myelin Sheath
- Axon terminals.
- Synapse
Dentrites
- Receives neural messages before sending it to the cell body and forms neurotransmitters.
Soma
- The cell body, responsible for maintenance of the of the cell.
- ## Combines neural information and sends it to the axon.
Nucleus
- Has biochemical info to keep neuron functioning.
Axon.
Transmits messages from the Soma to other cells in the body.
Myelin Sheath.
- A white, fatty covering that insulates the axon.
- Protects messages from interference.
Axon terminal.
- end of the axon is the axon terminal, it releases messages into synapses.
Synapses.
- transmission site of electric nerve impulses between 2 neurons.
Glial Cells.
- Provides insulation and nutrients.
- Aid in repairing and eliminating waste.
- Neurons can’t function without Glial Cells.
