Chapter 3 Psych Test Questions

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The behavior influences your nervous system
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Drug use can affect your nervous system and your neurochemistry
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Brain and neurochemistry also has a significant impact on your behavior
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what we think and feel from our neurochemistry. Ex : Parkinson’s
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label the neuron
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Myelin Sheath
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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
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Action Potentials
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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
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Neurotransmission
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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
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Antagonist
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blocking the receptor, none of the neurochemical is made, decrease the amount of a neurotransmitter
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Agonist
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increase the amount of Neurotransmitter

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