a&p - EPSP and IPSP

EPSP

what does EPSP stand for?

excitatory post synaptic potentials

EPSP

what is EPSP?

the local depolarization of post synaptic membrane that brings neuron closer to AP threshold

EPSP

what does neurotransmitter binding do?

it opens the chemically-gated ion channels allowed sodium and potassium to enter simultaneously

EPSP

what is EPSP’s function?

to trigger AP if EPSP is of threshold strength

IPSP

what does IPSP stand for?

inhibitory post synaptic potentials

IPSP

what does IPSP stand for

inhibitory post synaptic potentials

IPSP

what is IPSP?

the local hyperpolarization of postsynaptic membrane that drives the neuron away from the AP threshold

IPSP

what does inhibitory neurotransmitter binding do?

it opens either K+ or Cl- ion channels

IPSP

what happens when K+ ion channel is open?

if K+ ion channel is open, it will move out of the cell

IPSP

what happens if Cl- ion channel

opens?

it will move into the cell

IPSP

what does IPSP do to AP production?

IPSP reduces the postsynaptic neurons ability to produce an AP

Summation

why do EPSP summate

EPSP cannot induce an AP, so they summate to influence postsynaptic neuron

Summation

what are the 2 kinds of summation?

1. Temporal summation

2. Spatial summation

Summation

what is temporal summation

increased frequency of stimuli

Summation

what is spatial summation

stimuli from multiple sources