Essentials of Human Anatomy & Physiology (12th Edition)

Published by Pearson
ISBN 10: 1292216239
ISBN 13: 978-1-29221-623-2

Chapter 3 - Cells and Tissues - Review Questions - Page 134: 40

Answer

The thickening of Michael's lip is not caused by a tumor.

Work Step by Step

Biting the lip can act as a physical stimulus, which could lead to an increase in the number of cells in the body tissue. This is a response known as hyperplasia. Since there is no evidence of neoplasia, which indicates uncontrolled growth of cells, cancer can be ruled out with high probability.
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