Neurons send electrical impulses as information.
Dendrites receive signals from other neurons or from sensory receptors.
The cell body is the control of the neuron.
The axon carries the impulses away from the cell boy down the length of the neuron.
The myelin sheath protects the axon and speeds up nerve impulse.
The synapse is where the end of one neuron’s axon meets the dendrite of another neuron.
Sensory Neurons
- Carry nerve impulses from sensory receptors (vision, taste, touch, etc.) to the spinal cord and then brain
- Sensory neurons convert information senses into neural impulses
- When the impulses reach the screen, they are translated into sensations
- Not all sensory information travels to the brain
- Some neurons terminate in the spinal cord, allowing reflex actions
Long dendrites and short axons.
Relay Neurons
- Most lie between the sensory neuron input and motor output
- Allow sensory and motor neurons to communicate with each other
- Allows analysis of the sensation and what it means
- This helps us decide how to respond to it
- Relay neurons lie wholly within the brain and spinal cord
Short dendrites and short axons.
Motor Neurons
- Connect the central nervous system to muscles
- They form synapses with muscles and control their contradictions
- When stimulated, the motor neuron releases neurotransmitters that bind to the muscle receptors trigger a response
- This leads to muscle movement
Short dendrites and long axons.