Handout2

Handout2 - TA: Clarissa Chan Section: Wed 12-12:50p Coffee...

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OH: Tues 10-11a Section: Wed 12-12:50p Mandeville Coffee Cart Handout #2 (through 1/17) Action Potential Conduction : Stimulus: Can be mechano, stretch, or chemical. Causes graded potentials which are different from Action Potentials in the way that: Graded Potential Action Potential Can depolarize or hyperpolarize regenerative Can occur at the presence of any amount of excitatory or inhibitory stimulus Fixed amplitude Does not have a refractory period Absolute: no action potential can be fired Relative: stronger stimuli are needed to fire an AP Graded Potentials can lead to summation if stimuli in graded potentials are close together. Two graded potentials can cancel each other out if they are in opposite directions. Once the stimulus reaches the _________________, and is sufficiently depolarized by the graded potential (sufficient Na channels are opened), an action potential is fired. The resting membrane potential is _______ and to reach threshold, the cell membrane of the axon must
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This note was uploaded on 03/10/2011 for the course BIPN 100 taught by Professor French during the Winter '07 term at UCSD.

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Handout2 - TA: Clarissa Chan Section: Wed 12-12:50p Coffee...

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