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Biology: The Unity and Diversity o...
Biology: The Unity and Diversity o...
Cancers most commonly arise in ______ tissue.
- a. epithelial
- b. muscle
- c. nervous
- d. connective
Introduction: Cancer is a state where the cells grow wildly and uninhibitedly. Every cell must perform its assigned function and undergo death at a particular stage. Cancer cells arise when the normal cells refuse to undergo apoptosis (cell death) and multiply indefinitely by disrupting the task performed by other cells in the body. Cancer cells are formed in our body when the proto-oncogenes get activated, and the tumor suppressor genes get inactivated. Cancer cells do not get inherited to the progenies, as they occur in the somatic cells.
Reason for correct answer:
The epithelial tissues are mostly renewed by the animals. The skin epithelium is mostly replaced and sheds about 0.7 kilogram each year. In order to maintain the epithelia, the cell has to be constantly divided, which produces many DNA replication errors that can ultimately lead to cancer-causing mutations. Thus, the epithelial tissues in animals become cancerous. A carcinoma is known as the epithelial cell cancer. The examples for carcinomas are skin cancers, stomach cancer, lung cancer, colon cancer, breast cancer, and so on.
Option a. is given as “epithelial”.
A carcinoma is known as the epithelial cell cancer, which takes place mainly due to the continuous replacement and shedding of the epithelial cells.
Hence, the correct answer is option a.
Reasons for incorrect answer:
Option b...
Chapter 31 Solutions
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