cardiovascular physiology Flashcards

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1
Q

what is heart contraction?

A

the electrical impulse that triggers contraction of the cardiac muscle (contractile) cells is intrinsic (arises in the heart itself) and stimulation from nervous system is not required

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2
Q

what are conducting cells? associated with the intrisic conduction system

A

special cardiocytes that initiate and distribute action potencials in heart muscle

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3
Q

what are nodes?

A

clusters of autorthymic cells that generates spontaneous action potencials in heart

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4
Q

what is different about the resting potencial within autorythmic cells?

A

cells in nodes have an unstabble resting potencial (Na
+ leaks in)

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