Heartbeat and Heart Contraction Coordination


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question 1 of 3

The SA node is called the pacemaker of the heart because it _____

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1. In what order are the impulses transmitted in the intrinsic conduction system?

2. The delay at the AV node supports coordinated blood flow through the heart by _____.

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About This Quiz & Worksheet

Looking at what controls your beating heart, this quiz and corresponding worksheet will help you gauge your knowledge of heart contraction coordination. Topics you'll need to know to pass the quiz include understanding why the SA node is called the pacemaker of the heart as well as knowing the correct path for an impulse in the intrinsic conduction system.

Quiz & Worksheet Goals

Use this printable worksheet and quiz to review:

  • Why the SA node is known as the pacemaker of the heart
  • Path the impulse takes in the intrinsic conduction system
  • Reason the delay at the AV node is important
  • When electrical impulses reach the Purkinje fibers
  • Characteristics of the intrinsic conduction system

Skills Practiced

This worksheet and quiz will let you practice the following skills:

  • Interpreting information - verify you can read information regarding why the SA node is known as the pacemaker of the heart and interpret it correctly
  • Knowledge application - use your knowledge to answer questions about the path the impulse takes in the intrinsic conduction system
  • Reading comprehension - ensure that you draw the most important information from the related heart contraction coordination lesson

Additional Learning

To learn more about how our hearts can contract on its own, review the corresponding lesson on Heartbeat and Heart Contraction Coordination. This lesson will help you:

  • Identify the process of a normal cardiac cycle
  • Understand what controls the beating of our hearts
  • Define what the intrinsic conduction system is
  • Describe where the heartbeat first begins in the system
  • Appreciate why the AV node is known as the traffic cop of the heart