Complete the Concept Map to describe ionic movement during action potentials in cardiac pacemaker and contractile cells, and trace the conduction pathway. Drag the appropriate labels to their respective targets. AV nodes, bundles, branches, and Purkinje fibers -are specifically made of → directly trigger atria to contract and activate Ca2+ ions directly trigger ventricles to contract and activate cardiac muscle fibers enter plateau phase due to slow influx of K ions rapidly depolarize due to influx of Na ions pacemaker cells -repolarize due to efflux of → slowly depolarize due to influx of SA nodes

answer: c

explanation:

geologic time scale (for gradpoint) =)

potentially fatal issues such as heart attacks and strokes

explanation:

answer;

medical directors

explanation;

medical directors grants and supervises the privilege or permission to use an aed on an ambulance.

other roles of a medical director includes;

-provide medical leadership, including coordination with local ems and 911 centers.

-provide guidance in equipment selection and deployment

-develop guidelines for responder actions

-oversee medical care that is rendered through the program, including review of all responses to medical emergencies

-ensure appropriate initial training and skill maintenance

-assume overall responsibility for the conduct and operation of all patient care related activities