MITOSIS & CANCERBe sure to turn in any labs from yesterday.

Today we will be discussing:

Mitosis Every minute your body needs to make

300 MILLION new cells!!

Your DNA carries all the instructions for the cell, including when to do mitosis

Mutations A mutation is an error in DNA. This error

can cause many different things.

Mutations Sometimes that mutation can cause

mitosis to mess up.

If mitosis starts to mess up, cells begin dividing uncontrollably. This is how cancer begins.

Tumors Cells that divide uncontrollably will

create a tumor. Tumors can be benign (not harmful, can be removed) or malignant (bad and will spread!)

Cancer Cancerous cells continue to divide

uncontrollably and can harm the rest of the body.

They use valuable resources (oxygen and food)

They can damage other organs.

Cancer Cells Cancer cells are weird in a lot of ways:1. They Cancer cells are frequently "immortal": whereas normal cells divide about 50 times and them die, cancer cells can go on dividing indefinitely.2. Cancer cells often have unusual numbers of chromosomes or mutations in chromosomes. 3. Cancer cells may also have an abnormal cell surface; instead of "sticking" to its neighboring cells, cancer cells tend break attachments to its neighbors cells, allowing for metastasis.4. Cancer cells ignore the usual cues and continue multiplying after contact with other cells are made, piling up until all nutrients are exhausted.

What Causes Cancer? Each table has an article to read about 1

possible cause of cancer. Read the article then make a poster showing:1. The cause2. A symbol for the cause (draw this)3. One sentence to describe the cause4. One sentence to explain how this contributes

to cancer5. One sentence to say if this can be prevented,

if it can, how? If it cannot, why?

Gallery Walk Each group will have their poster hung

up in the room Everyone will silently walk around and

read/ take notes about the poster