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Unit 2 Ap psych

WHS AP Psych 1

TermDefinition
Frontal lobe Cerebral lobe responsible for problem-solving, reasoning, and motor skills.
Neurons Send messages to each other through neurotransmitters. Smallest unit of the nervous system. Transmits and receives information. 100 billion _ in the brain
Sensory/Afferent Neurons Communicate from environment to system. Outside to in
Motor/Efferent Central system to muscles. Inside to out.
Interneurons Communicate between two. "Middle man"
Soma Cell body, supports life
Dendrites Receive information
Axon Passes messages
Neural impulse Action potential
Myelin sheath Helps speed up and insulate axon. Fatty layer around axon.
Terminal branches Connect to other neurons
Presynaptic Holds neurotransmitters. Axon terminal
Synaptic (vesicles) Holds chemicals/transports neurotransmitters
Neurotransmitter Chemical messenger
Receptor Processes neurons
Reuptake Process that reuses diffused chemicals
Action Potential Brief electrical signal sent to an axon. Neurons use this to send messages
Refractory period Required resting period after a message is sent
Resting potential State where neurons await the signals
Ion Electrically charged particle
Depolarization Na becomes positively charged
Threshold Level of stimulation needed. -55 mv
All or None Law Neuron fires or it doesn't. Intensity based upon frequency
Step one Resting potential. Na outside, K inside. Polarized. -70 mv
Step two Action potential. K outside. Na inside. Depolarized. +30 mv
Step three Refractory period. Na outside. K inside. "Back to normal". Repolarized.
Antagonist Blocks neurotransmitters. Not naturally occuring substances.
Agonist Mimic neurotransmitters. Fits receptors well.
Excitatory Increase likelihood of action potential. Glutamate. (huffing glue? pumped up? Ms. S is weird)
Inhibitory Decrease likelihood of action potential. GABA.
Acetylcholine Muscle movements and memory. Surplus: Severe muscle spasms. Deficit: Deterioration of memory
Dopamine Surplus: Schizo. Deficit: can not control movements (parkinson's disease)
Serotonin Surplus: anxiety. Deficit: Depression
Norepinephrine Surplus: always on edge. Deficit: depression
GABA INHIBITORY. Surplus: learning impairment. Deficit: Seizures
Glutamate EXCITATORY. Surplus: overstimulation. Deficit: possible depression and memory problems
Endorphins Surplus: numb, no pain at all. Deficit: a whole lot of pain
Created by: lores_cave
 

 



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