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19.2.1: Student Notebook Assignment

Anatomy and Physiology · LibreTexts

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    From LibreTexts, under CC BY 4.0, as the source states it; its equations are written in TeX, which the PDF shows typeset. This page at LibreTexts.

    Read only the part listed below. Take notes and answer questions as described. Each note taking instruction should be done in your own words, in 1-2 sentences or bullet points, unless otherwise stated.

    19.2 Cardiac Muscle and Electrical Activity

    • Define autorhythmicity and explain its importance for the heart.
    • Explain the difference between myocardial contractile cells and myocardial conducting cells.
    • Describe the structure of cardiac muscle. What distinguishes it from other types of muscle?
    • Describe the role of the sinoatrial and atrioventricular nodes during a heartbeat.
    • Describe electrical conduction in the heart and explain how it relates to contraction.
    • Explain the role of Purkinje fibers in electrical conduction.
    • Explain the role of calcium in cardiac muscle contraction.
    • Describe the relationship between the action potential and the muscle contraction in cardiac muscle and contrast that with skeletal muscle.
    • Describe how the ECG demonstrates cardiac activity.
    • What would it tell you if the R wave was irregular?

    19.2.1: Student Notebook Assignment is shared under a CC BY 4.0 license and was authored, remixed, and/or curated by LibreTexts.