Electrophysiology

Question 1

depolarization

Answer 1

cardiac cell at rest at -90mV - depolarizes to +20mV when stimulated

Question 2

repolarization

Answer 2

return of polarity of cells back to -90mV

Question 3

excitability

Answer 3

majority of cardiac cells capable of being stimulated to depolarize

Question 4

conductivity

Answer 4

stimulation of 1 cell leads to stimulation of adjacent cells

Question 5

contractility

Answer 5

property of excitable cells to mechanically contract/shorten

Question 6

automaticity

Answer 6

spontaneous depolarization - 1% of cardiac cells, located in SA node, AV node, Purkinje fibers - make up conduction system