PHYSIOLOGY: graded potentials vs action potentials

Created by nursekatrina 

Upgrade to
remove ads

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

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions above and try again

Example:

Reload the page to try again!

Reload

Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

NEW! Voice Recording

Create Set