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Home Q & A Board Biology-Related Homework Help Anatomy and Physiology
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Edwindsor Edwindsor
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8 years ago
Select the correct statement about the function of myocardial cells.
A) Cardiac muscle cells are innervated by sympathetic, parasympathetic, and somatic nerve fibers so that the nervous system can increase heart rate.
B) The entire heart contracts as a unit or it does not contract at all.
C) The refractory period in skeletal muscle is much longer than that in cardiac muscle.
D) The influx of potassium ions from extracellular sources is the initiating event in cardiac muscle contraction.
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Anatomy & Physiology

Anatomy & Physiology


Edition: 5th
Authors:
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- Eddy
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ancraancra
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8 years ago
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Edwindsor Author
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#2
8 years ago
How do you do it! You're so smart lol
- Eddy
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#3
8 years ago
You're welcome Happy Dummy
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