Chapter 3 psych

The behavior influences your nervous system
Drug use can affect your nervous system and your neurochemistry
Brain and neurochemistry also has a significant impact on your behavior
what we think and feel from our neurochemistry. Ex : Parkinson’s
label the neuron
Myelin Sheath
White, fatty substance; insulates the axon so messages can be sent faster without losing anything. so that it does not take a long time to take action for something like pain
Action Potentials
New message created by the soma
Created by the axon, name of
Balance of certain key ions like potassium, sodium, calcium, magnesium, chloride and more
Ions have a charge- electricity is made with these combination of ions
Sodium and potassium (neurons need these ions to send a message)
Ions are the batteries that exist in the phone to pick up and send a message
Ions flow in and out of cells via ion channels
Soma is filled with negatively charged ion and outside vise versa
All or nothing events
If the soma does not reach a high enough positive charge
Action potential will continue down the length of the axon without stopping and can only move forwards, not back
Afterwards, there is an outflow of K ions
There is a brief refractory period where another action potential cannot be generated
Neurotransmission
The sending of a message from neuron to neuron
The “Mailman” of these messages = neurotransmitters
Dopamine, serotonin, norepinephrine, acetylcholine, glutamate, GABA, endorphins, etc.
The neurotransmitters are packaged in the axon terminal buttons, released into the synapse and are picked up by the receptors of other neurons
There is a fine balance of Neurotransmitters that your brain needs to function properly
Need baby bear levels, just right amount of neurotransmitter
Too much Dopamine = Schizophrenia
Too little dopamine = Parkinson’s
Drugs that are prescribed for these neurological conditions are NOT neurotransmitters in a pill
These drugs work to either increase or decrease the amount of neurotransmitter that is released and or picked up by the neurons
Antagonist
blocking the receptor, none of the neurochemical is made, decrease the amount of a neurotransmitter
Agonist
increase the amount of Neurotransmitter
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