Define heart attack and infarct. How does atherosclerotic plaque  affect the heart? 12. Explain how cardiac muscle cells in the SA node produce action  potentials spontaneously and why the SA node is the heart’s pacemaker. 13. What is the function of the conduction system of the heart? Starting  with the SA node, describe the route of an action potential as it goes  through the conduction system of the heart

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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8. Define heart attack and infarct. How does atherosclerotic plaque 
affect the heart?

12. Explain how cardiac muscle cells in the SA node produce action 
potentials spontaneously and why the SA node is the heart’s pacemaker.

13. What is the function of the conduction system of the heart? Starting 
with the SA node, describe the route of an action potential as it goes 
through the conduction system of the heart.

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