The Nervous System

Video Anticipation Statements

• Pain happens only in your head.• Anyone can be hypnotized.• Nerves don’t actually touch each other.• Not feeling pain is a good thing.• Most people can get along just fine with out

senses.• You can control your nervous system.

Challenge ?• Are you more right-brained or more

left-brained? • Take the Test • Describe/diagram your results below.

Connection• Why is it important

that reflexes occur without thought?

Vocabulary

• Central nervous system• Peripheral nervous system• Impulse• reflex

Resources

• Video –– Human Body: Pushing the Limits: Sensation

(open)– Human Body: Pushing the Limits: Brain

Power(close) if time allows• Be Nervy – Simulate nerve impulses• Guided Notes • Complete Objective Notes

Objectives NotesDescribe the peripheral nervous system(Copy & label diagram of neuron pg. 589)

Function of system –

> Neurons transmit information by - > sensory neurons – > motor neurons -

Describe the central nervous system (Copy & label diagram of brain pg. 592)

Function of system –

> Brain- > cerebrum- > cerebellum- > medulla-

> Spinal Cord

Explain the difference between neurons and nerves

Describe the peripheral nervous system

– Function of system – Collects, sends information to and responds to information from the central nervous systems• Neurons transmit information by – special cells that

transfer messages (impulses)around the body by electrical energy • sensory neurons –collect information and send to CNS• motor neurons – respond to information sent from CNS

Describe the central nervous system

• Function of system – Processes information sent by the PNS– Brain- largest organ in nervous system –mission

control• cerebrum- stores memories, controls voluntary movement,

detects touch, light, sound, sight, odors, taste; judgment• cerebellum- controls body position and movement• medulla- controls most involuntary processes; life processes

– Spinal Cord – connects PNS with brain – relay; initiates reflexes before signal can travel to brain -

Explain the difference between neurons and nerves

• Neurons are cells that transfer electrical impulses through out the body and nerves are the axon parts of the neurons bundled together with blood and connective tissue