3 The Concept Of The Synapse Flashcards
gaps between neurons
where neurons communicate by transmitting chemicals ]
synpase
automatic muscular responses to stimuli
reflexes
circut from sensory neuron to muscle response
reflex arc
repeated stimuli within a brief time have cumulative effect
light pinch of a dog’s foot
temporal summation
the cell that receives a message
postsynaptic neuron
the cell that delivers a message
pre-synaptic neuron
glands that produce hormones
endocrine glands
epinephrine, norepinephrine, insulin, and oxytocin serve both as ________ & ________
neurotransmitters, hormones
a neurotransmitter does not linger at postsynaptic membrane it:
either inactivated or reabsorbs (reuptake)
in certain brain areas, presynaptic neuron takes up most of the released neurotransmitter molecules intact and reuses them
reuptake
graded depolarization; occurs when sodium ion enter the cell
excitatory postsynaptic potential (EPSP)
synaptic inputs from various locations combine their effects on a neuron
several small stimuli on a similar location produced a reflex when a single stimuli didn’t
spatial summation
spatial summation is critical to brain functioning
each neuron recieves many incoming axons that frequently produce _______ responses
synchronized
temporal and spatial summation ordinarily occur _____
together
input from an axon hyperpolarizes the postsynaptic cell
inhibitory synapses
