Page 3 - SELF-PACED LEARNING MODULES

Action potential
(nerve impulse, Resting neural
electrical signal) membrane
carries a
charge of -70
mV and a
Polarity: the condition of stimuli
having a positive and a
negative pole. The direction of threshhold of
the current is from the + to the -55mV
--

Polarization

Polarization the inside
of the neuron is Relative refractory period occurs
negative relative to the when the cell is repolarizing
outside. It is due to the
Depolarization outward leak of K .
+

Depolarization.
Condition where the
inside of the neuron
becomes less negative;
Repolarization it is due to an inward
movement of Na .
+
Repolarization
Condition where the
inside of the neuron
returns to its resting
state… negative. It is
due to the outward
+
movement of K .
Synapse The synapse includes the presynaptic
During a nerve membrane, the neurotransmitters
impulse, and inactivators, the anatomical
neurotransmit space/cleft and the receptors of the
ters carry the postsynaptic membrane
impulse from
the
presynaptic
neuron to the
postsynaptic
neuron