Chapter 6, Problem 1LTB

Describe three ways that cancer cells differ from normal cells.

Summary Introduction

To write:

Cancer cells differ from normal cells.

Introduction:

Cancer is a disease which occurs due to uncontrollable cell division in any part of the body. Mitosis is the forms of cell division that arise when two daughter cells are formed from one parent cell. The process of mitosis is normally regulated, when the regulatory mechanism of the mitosis fails and cause uncontrolled division, the cancer or the tumor formation occurs.

Explanation of Solution

NORMAL CELL	CANCER CELL
a. Normal cells divide when they required more cells and stop forming when they get a signal.	Cancer cell divide but does not react to this signal and leads to abnormal cell division.
b. Normal cells move in response to signal for many physiological processes and they stay together in a group. They do not migrate from one place to other.	Cancer cell fails to secrete such substance, so they are passed through the circulatory and lymphatic system in any region of the body during metastasis.
c. Normal cell stop forming when they invade surrounding tissues.	Cancer cell neglected these cells and invade surrounding tissues, hence become malignant.

Conclusion

The cancer cells lack the cell cycle regulatory mechanism and contact inhibition, whereas, the normal cells divide in a controlled manner.