Transcript When Good Cells Go Bad__

WHEN GOOD
CELLS GO BAD!!
Regulators of Cell Growth and
Cancer
STANDARD(S):
 BI5. a. Students know the general structures and functions of DNA,
RNA, and protein.
 Explanation-5.a.-DNA-double helix-contain genetic info, RNA-single-
stranded, copy of a section of DNA, protein-make up many parts of the
body
OBJECTIVES:
SWBAT…
 Explain the origin of new cells.
 Describe the structure and function of DNA.
 Understand that cancer is caused by a malfunction of the cell cycle.
CELL CYCLE REGULATION
 Injuries (broken bones and cuts), need new cells
 Cells at edge of injury will rapidly divide producing new cells
 When the injury heals cell division slows down
CELL CYCLE REGULATION
 What tells cells to divide, make copies of their chromosomes, or enter
another phase of the cell cycle?
 Many proteins regulate the cell cycle.
 Cyclin – causes a mitotic spindle to form in a non-dividing cell.
 Internal and External Regulators (proteins)
WHAT IS CANCER?
 Body’s cells lose the ability to control growth.
 Cancer cells do not respond to signals that control cell growth.
 Disease of cell cycle.
 Tumors (masses of cells)
CAUSES OF CANCER
 Causes – smoking tobacco, radiation exposure, and viral infections
 Science can lead us to the cure for cancer
 Cancer affects all of us
Cancer Facts
http://www.cancer.org/acs/groups/content/@epidemiologysurveilance/documents/document/acspc-029771.pdf
 2011-571,950 expected cancer deaths
 Women-over 240,000 women expected to be diagnosed with breast
cancer this year
 Men-over 240,000 men expected to be diagnosed with prostate cancer
this year
 Cancers common in teenagers: Ewing’s sarcoma, leukemia, lymphoma,
astrocytoma
LUNG CANCER CELLS
SKIN CANCER
BREAST CANCER CELLS
SUMMARY QUESTIONS
 How does your body replace a cell after an injury?
 Which type of molecules tell the cells to divide and grow?
 What is cancer?
 How can cancer be caused?
 Which types of cancer are commonly found in teenagers?