Muscular System

Question 4 - Single Best Answer

Identify the cell at the tip of the arrow:

A) smooth muscle cell

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By noting the cardiac muscle fibers on the edge of the photomicrograph, you can identify the location of this tissue as being from the heart. The only smooth muscle in the heart is located in the walls of blood vessels. In addition, the amount of cytoplasm present in the purkinje fiber is more than you would expect to see in a smooth muscle cell.