The Nervous System
9
The Nervous System
description
The Nervous System. The Nervous System. Central Nervous System. Peripheral Nervous System. nerves and ganglia outside of the brain and spinal cord. Brain and Spinal Cord. Motor Neuron. Relay and Sensory Neurons. Reflex Arc. Signal goes Sensory -> Relay -> Motor Action bypasses brain. - PowerPoint PPT Presentation
Transcript of The Nervous System
The Nervous System
The Nervous System
Central Nervous System• Brain and Spinal Cord
Peripheral Nervous System• nerves and ganglia
outside of the brain and spinal cord
Motor Neuron
Relay and Sensory Neurons
Reflex Arc
• Signal goes – Sensory -> Relay -> Motor– Action bypasses brain
Reflex Arc
Receptor• The nerve that “feels” the
pain
Effectors• The muscle that moves to
avoid the pain.
Muscles can only pull, never
push!
Antagonistic Muscles- Muscles that work against each other.
Sensory Organs
• Groups of receptor cells responding to stimuli. Such as: Light, sound, touch, temperature and chemicals
Light Accommodations of the Eye
![The Nervous System. Divisions of the Nervous System Central Nervous System [CNS] = Spinal Cord Brain Peripheral Nervous System [PNS]= Spinal Nerves.](https://static.fdocuments.us/doc/165x107/56649d6c5503460f94a4c71d/the-nervous-system-divisions-of-the-nervous-system-central-nervous-system.jpg)
