unit 3 Flashcards
Dendrites
Receives incoming signals
Soma
cell body (includes nucleus)
Axon
transmits electric signals
Myelin Sheath
speeds up signal down axon
Terminals
releases NT’s ( sends signal to next axon)
Synapse
gap between neurons
Action Potential
across a membrane electric signals that travels
All or non law
the neuron either fully fires with a full strength action potential or none at all
Refraction period
recovery time for the neuron to rest before sending a new signal
Sensory neurons
receives signals
Afferent neurons
accepts signals
Motor neurons
sends signals
Efferent neurons
signal exits
central nervous system
brain and spinal cord
Peripheral nervous system (NS)
rest of nervous system
somatic ns
Voluntary movements
automatic ns
Involuntary movements (heart/lungs) Ex: heart beating automatically with out thinking abt it
sympathetic ns
fight/flight ( prepares body to respond to stress or danger)
Parasympathetic ns
Rest and digest (calms body down after stress)
neurontransmitters (nt)
chemical releases and received by neurons
GABA
calms the brain down
Glutamate
leaning and memory
Dopamine
reward and movement
Serotonin
moods and emotion
acetylcholine
memory
Epinephrine and Norepinephrine
focus/ respond to stress
Endorphins
pain control, happiness
oxytocin
love and bonding, reproduction
Agonist
feel more alert (drug)
Antagonist
drug that blocks a nt
Reuptake
unused NTs are taken back up into the sending neuron (treatment for depression)
Hindbrain
oldest part of the brain
Cerebellum (inside hindbrain)
movement(what does ittake to ring a bell)
Medulla (inside hindbrain)
heart rate, breathing, blood pressure
Pons (inside hindbrain)
leep/arousa !(PonzZZZZ)
Reticular formation (midbrain)
attention (if you can’t pay attention, You R F’d)
Forebrain
higher thought processes
