Review for assessment

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Review for assessment

• The Nerve of You!!!

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Parts of the neuron
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3 types of neurons

• Sensory neuron picks up a sense and carries it
  towards brain.
• a) sight optic nerve
• b) touch pain, pressure, temp.
• c) taste taste buds
• d) smell olfactory bulb
• e) sound - cochlea
• 2. Motor Neuron -- connects from brain to your
  muscles for MOVEMENT
• a) voluntary choose
• b) involuntary automatic!!

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Notes for journal

• 3. interneuron connects other neurons together
• Main Parts of the nervous system
• CNS central nervous system
• BRAIN!!!!!
• Spinal chord
• 2. PNS Peripheral Nervous System
• Nerves sensory, motor, interneuron

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The Gap between 2 nerves
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• The gap between 2 neurons is called the synapse.

Chemicals called neurotransmitters are released
from the axon of one neuron and picked up by the
dendrites of the next cell to continue the message
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The Nervous System

• Can you now -Identify what roles different parts
  of the central nervous system play in behavior?

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What is the difference?

• Parasympathetic
• REST
• AND DIGEST

Sympathetic FIGHT OR FLIGHT
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Chemical Communication Neurotransmission
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PAIN
Endorphins PROMOTE pleasure.
Endorphins REDUCE pain.
PLEASURE
FYI - Dopamine is an endorphin
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3 main parts of the brain and their jobs

• Cerebrum thinking
• Cerebellum movement
• Brainstem life functions like heartbeat

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Homeostasis -

• ability to regulate ( keep the same) internal
  functions.
• Responding to stimuli to save yourself

This hurts Im hungry Im thirsty Im tired Im
hot Im cold
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neurotransmitters

• Neurotransmitters function
• Dopamine for reducing pain and motor function
• Serotonin - sleep patterns, hunger
• Glutamate - learning, memories
• GABA - inhibits other neurotransmitters and
  slows responses
• Inhibitory neurotransmitters block other
  transmitters

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Mouse lab how drugs effect brain and body

• Heroin blocks inhibitory transmitter so too
  much dopamine released.
• very addictive and do not care attitude
• Ecstasy - reverses serotonin pathway. Do not
  sleep or eat
• Marijuana - blocks inhibitory transmitter so too
  much dopamine released in areas of brain that
  control reactions, mood and hunger

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• Meth acts like dopamine. Addictive
• Alcohol Effects GABA ( motor skills) and
  Glutamate (memory/learning)
• Cocaine blocks dopamine uptake (so too much
  dopamine in synapse)
• LSD- serotonin , completely out of it and
  hallucinate

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Types of disorders/injuries extremely simplified

• 1. Concussion -injury, brain knocks against skull
• 2. Stroke- blocked or burst blood vein in brain.
  Act FAST
• 3. ALS- degenerative disease, loose ability to
  swallow, talk, then walk. 3-5 yrs
• 4. Parkinson's - degenerative disease, causes
  tremors (shaking)
• 5. Encephalitis - infection of fluid around brain
  spinal chord, curable

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Types of disorders/injuries extremely simplified

• 6. Epilepsy - overactive brain (short circuits)
  causes seizures , meds
• 7. Multiple Sclerosis attacks myelin.
  Degenerative muscle weakness, no cure
• 8. Meningitis - infection viral or bacterial of
  membrane around brain, curable but may have long
  term damage
• 9. Polio. Virus, causes paralysis, vaccine for
  it, not curable
• 1o. Alzheimers tangles and plagues in brain
  destroy memories newest first then older ones and
  ability to think/reason

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Reflex

• Sensory neurons pickup "problem"
• Send signal to CNS, spinal chord responds back
  through motor neurons
• Signal still goes to brain but response is
  already happening
• When it happens before you know it