CICM First Part Practice Questions - CICM First Part Examination Of The Basic Sciences For Intensive Care Medicine Exam

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The spontaneous phase 4 depolarisation ('pacemaker potential') of sinoatrial node cells is largely attributable to which current?

Fast sodium current (INa) L-type calcium current only The 'funny' current (If), a mixed Na+/K+ current Delayed rectifier potassium current (IK)

Correct Answer:

The 'funny' current (If), a mixed Na+/K+ current

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