How can we help?

You can also find more resources in our Help Center.

18 terms

PHYSIOLOGY: graded potentials vs action potentials

STUDY
PLAY
graded potentials
graded potential change; magnitude varies with magnitude of triggering event
graded potentials
duration varies with duration of triggering event
graded potentials
decremental conduction; magnitude diminishes with distance form initial site
graded potentials
passive spread to neighbouring inactive areas of membrane
graded potentials
no refractory period
graded potentials
can be summed
graded potentials
can be depolarization or hyperpolarization
graded potentials
triggered by stimulus, by combination of neurotransmitter with receptor, or by spontaneous shifts in leak-pump cycle
graded potentials
occurs in specialized regions of membrane designed to respond to triggering event
action potentials
all-or-none membrane response; magnitude of triggering event coded in frequency rather than amplitude of action potentials
action potentials
constant duration
action potentials
propagated throughout membrane in undiminishing fashion
action potentials
self-regeneration in neighbouring inactive areas of membrane
action potentials
refractory period
action potentials
summation impossible
action potentials
always depolarization and reversal of charges
action potentials
triggered by depolarization to threshold, usually through spread of graded potential
action potentials
occurs in regions of membrane with abundance of voltage-gated Na+ channels