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Question

Ventricular systole is due to the activity of __________.

A
Organ system
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B
Organ
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C
Tissue
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D
Cell
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Solution

The correct option is C Tissue
The correct answer is C.
The SA node, also known as the sinus node, represents a crescent-like shaped cluster of myocytes divided by connective tissue, spreading over a few square millimeter. This causes the major electrical changes in heart during cardiac cycle, including ventricular systole.

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