Biology and Anatomy & Physiology Helps: The Heart (Biology and Anatomy and Physiology Helps:) by Carolyn Miller

Author:Carolyn Miller [Miller, Carolyn]
Language: eng
Format: azw3
Published: 2013-01-13T16:00:00+00:00

make up the intrinsic cardiac conduction system

have an unstable resting potential due to open, slow, sodium (Na+) channels

influx of calcium (Ca2+) produces the resting phase of the action potential

inactivation of calcium (Ca2+) channels results in repolarization and the opening of voltage-gated potassium (K+) channels

there are 5 steps in the sequence of electric excitation of the heart muscle

the sinoatrial node also know as the pacemaker generates impulses

sinoatrial node -impulse generating tissue located in the right atria of the heart

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