6. What does the mitotic index # tell you? Specifically, what did the mitotic in
ID: 269118 • Letter: 6
Question
6. What does the mitotic index # tell you? Specifically, what did the mitotic index reveal about the root tissues you examined? Were your results what you expected? Why or why 4 pts) 7. Which tissues in the human body would you expect to have a low mitotic index, and which would you expect to have a high mitotic index? Explain your reasoning. (2 pts) 8. A pathology report on biopsied tissue will often include the mitotic index for the tissue. Explain how this number can be used to evaluate the presence of cancer in a tissue. (2 pts) 9. During mitosis, cells are very sensitive to radiation. When exposed to radiation, these cells will often undergo "programed cell death." Cells in interphase are more resistant to radiation. How does this help explain why radiation is an effective treatment for many forms of cancer? (2 pts) 4Explanation / Answer
1) mitotic index = no of cells dividing/ total no of cells.
it tells you about cell proliferation. more the index more cells are dividing. in root tissue we saw higher mitotic index.
2) in human neuron tissue have lower while skin cells will have higher mitotic index.
3) cancerous cells are fast dividing cells so they have higher mitotic index as compare to normal cellls.
4) high energy radiation causes DNA damage. cancerous cells are rapidly dividing cells so they don't have time to stop and repair damage while normal cells first repair the damage and then divide. so radiation causes more damage or kill cancerous cells faster as compare to the normal cells.
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