2.6 Lundy Ch. 2 (2) Flashcards
depolarization
potential becomes less negative than RMP
depolarization is ____
excitatory
hyperpolarization is ____
inhibitory
hyperpolarization
potential becomes more negative than RMP
modulation
- gradual
- longer lasting changes in membrane potential
local potential
- initial change in membrane potential
- only spreads a short distance
action potential
- brief, large depolarization that is repeatedly regenerated along an axon
- spreads long distances
sequence of events in generating an action potential
- deformation of receptor
- change in LMP
- development of action potential in axon
- NT binds to ligand gated receptor on postsynaptic membrane
- synaptic potential in postsynaptic membrane
local potentials classified as
- receptor potentials
- synaptic potentials
local potentials are spread this way
passively
local potentials: amplitude
- small
- graded
most local receptor potentials are ______
depolarizing (excitatory)
*some can be hyperpolarizing
local synaptic potentials are generated in
- motor neurons
- interneurons
What stimulates local synaptic potentials?
other neurons
local potentials: ion channel responsible for change in potential
local receptor potentials
modality gated channels
local potentials: ion channel responsible for change in potential
local synaptic potentials
ligand gated channels
With local potentials, what happens to amplitude?
decreases with distance traveled
How are significant changes in potential created from local potentials?
- temporal summation
- spatial summation
temporal summation
combined effect of small potential changes
spatial summation
local potentials generated in different regions of the neuron are added together for a combined effect
What determines what happens in the neuron?
net change in potential
