Brain/Neural Firing Flashcards
Biological Psychology
study on how or make up influences behavior, thoughts and emotion
Neuron
processes information in body (three types)
Sensory Neurons
carry messages IN from the body’s tissues and sensory receptor to CNS for processing
Motor Neurons
carry OUT instructions from the CNS to body’s tissue
Interneurons
processes information between sensory input and motor output
Dendrite
receive messages from other cells
Axon
passes messages away from cell body to other neuron, muscles, and glands
Myelin Sheath
cover axon of some Neurons and helps speed neural impulses
Multiple Sclerosis
disease that affects central nervous system, specifically the myelin sheath, it slows down neural impulses
Myasthenia Gravis
can cause weakness in muscles because of Acetylcholine deficiency
Glial Cells
help insulate, restore, and protect body
Action Potential/Firing potential
neural impulse traveling down axon like a wave
Resting Potential
no neural impulse is traveling down the axon
Refractory Period
does not allow any more action potential to be created
Threshold
a certain amount the action potential has to gain before it starts moving
Synapse
gap between the cells
Excitatory Synapse
synapse that increases the action potential
Inhibitory Synapse
Synapse that decreases the action potential
All-or-None Response
either the the neuron fires or it does not (no in between)
Polarization
action potential in a cell
Depolarization
neurons charge is becoming positive
Repolarization
neurons charge going back to negative state
Neurotransmitters
chemicals used to send signals across synapse
Acetylcholine
enables muscle action, learning, memory, and sleep
Dopamine
influences movement, learning, attention, emotion, and reward pathway
Serotonin
Affects mood, hunger, sleep, and arousal
Norepinephrine
helps control alertness and arousal
GABA
major inhibitory neurotransmitter, reduces excitability
Glutamate
major excitatory neurotransmitter, involves memory
Endorphins
body’s natural pain reliever and mood enhancers
Substance P
helps transmit pain signals to brain and spinal cord
Agonists
molecule fill receptor site, and impersonates neurotransmitter
Antagonists
fills the lock so neurotransmitter cannot active the receptor cite