Chapter 10 - Nerves PART II

17 terms by nusly 

Create a new folder

Advertisement Upgrade to remove ads

Hyperpolarized

membrane potential becomes more negative,

Depolarized

membrane potential becomes less negative,

Graded (or proportional)

intensity of stimulation reaching thershold potential

Action Potential

reaching threshold potential results in a nerve impulse

Absolute Refractory Period

Time when threshold stimulus does not start another action potential

Relative Refractory Period

Time when stronger threshold stimulus can start another action potential

Synaptic transmission

where released neurotransmitters cross synaptic cleft and react with receptors in postynaptic neuron membrane

Open & Close Ion Channels

some neurotransmitters

Excitatory Postsynaptic Potential

depolarizes membrane of postsynaptic neuron - action potential becomes more likely

Inhibitory Postsynaptic Potential

hyperpolarizes membrane of postsynaptic neuron - action potential becomes less likely

Summation

When EPSP and IPSP are added together

Greater AP

More EPSPs lead to greater probability of AP

Neuropeptides

act as neurotransmitters and are synthesized by the neurosn in brain & spinal chord

EX of neuropeptides

Enkephalins, Beta endorphin, Substance P

Neuronal Pools

Interneurons working together to perform common function (excite or inhibit)

Convergence

Various sensory receptors - can allow for summation of impulses

Divergence

Branching axon - stimulation of many neurons ultimately

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