Flashcards: intrinsic cardiac conduction system

Unstimulated ___________ ____ of the heart maintain a stable resting membrane potential 

Autorhythmic ____________ ____ that depolarize spontaneously are part of the intrinsic cardiac conduction system they have an ___________ resting potential that continuously depolarizes toward the threshold

1. Pacemaker potential

Ion channels in the _____________ have special properties 

_______________ at the end of the action potential both _________ ____________ __________ and _______ ______ ________ __________ the sodium influx causes membrane interior to become _______ _________

2. Depolarization 

Threshold at ______ causes _________ _________ to open allowing for explosive entry of calcium from extracellular space, this causes ___________ _____ to reverse their __________ _________ due to the influx of calcium

3. Repolarization

___________ _________ inactivate the falling phase of the action potential happens due to ________ __________ __________

Once repolarization is complete, _________ ___________ ______, and the ____________ _____ slowly depolarize again

state the sequence of excitation

1.

2.

3.

4.

5.