Intrinsic Control of Heartbeat Rate Involves What Mechanism(s)

question 60

Multiple Choice

Intrinsic control of heartbeat rate involves what mechanism(s) ?

• A) The AV node initiates heartbeat although the SA node can generate a slower beat rate.
• B) The atrioventricular bundle initiates signals that travel to the Purkinje fibers.
• C) The Purkinje fibers initiates signals that travel to the atrioventricular bundle.
• D) The SA node initiates heartbeat and the AV node inhibits the heartbeat.
• E) The SA node initiates heartbeat although the AV node can generate a slower beat rate.