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Presentation transcript:

The Nervous System

iction/drugs/mouse.html

WHAT PARTS DO YOU KNOW THAT ARE IN THE NERVOUS SYSTEM? Brain Spinal Cord Peripheral Nerves

Central Nervous System Peripheral Nervous System The Nervous System SomaticAutonomic SympatheticParasympathetic Spinal Cord Brain

What makes up the brain, the spinal cord or your peripheral nerves? Neurons are “the cell” Cell body Nucleus Axon Dendrite What do you think surrounds the cell? What other organelles would be needed?

Neurons

How do neurons work?

How are neurons connected? Synapses!!

Why are neurons connected?

More neuron connections!

Close up look at your synapse The synapse - where the action happens The next cell’s plasma membrane What is this in the membrane ? Transport protein

The Spinal Cord and Reflex Arc

YOUR BRAIN!!!!!!

A complicated system…

SYMPATHETIC

A complicated system… SYMPATHETIC AUTONOMIC

A complicated system… SYMPATHETIC AUTONOMIC PARASYMPATHETIC

A complicated system… SYMPATHETIC AUTONOMIC PARASYMPATHETIC

A complicated system… SYMPATHETIC AUTONOMIC PARASYMPATHETIC

A complicated system… SYMPATHETIC AUTONOMIC PARASYMPATHETIC

A complicated system… SYMPATHETIC AUTONOMIC PARASYMPATHETIC RECEPTORS

I sense something…

What do you think can change neurons and their connections? Accidents Drugs Alcohol Disease

Accidents Physical injury of your neurons

Drugs and alcohol bind important receptors on neurons

Repeated binding causes the neuron to die

Drugs = neuron death

Alcohol damages dendrites - can repair after abstinence Alcohol blocks receptors and slows down transmission

Parkinson's Disease ALS - Lou Gehrig’s Disease Huntington’s Disease Multiple Sclerosis Alzheimer's Cerebral Palsy Epilepsy ? SIDS

100 Billion or so neurons - what’s the problem with some of them dying? Cells multiply all the time - will your neurons? Does everyone react the same way to accidents, or drugs and alcohol? Do all organisms react the same to all stimulus? Which of your activities use your neurons?

What if neurons die here? or here