11/29 & 11/30 - 7th Grade Agenda

Learning Objective: Learn about Cancer & Stem CellsCollect HW: Reading & Note Taking p.79 – 80 Cell Cycle QuizBrainpop: Stem Cells & Specializations & Cancer, MitosisChap 4 Study GuideClass Reading p.135-141HW: Reading & Note Taking p.81 – 84Reminder: Chap 4 Test on 12/5

Reflection

• Prompt: Copy the drawing of the Cell Cycle on p. 132 – 133. Label each phase.

Cell Cycle

Interphase Prophase

Metaphase

AnaphaseTelophase

Cytokinesis

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?

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DNA – Deoxyribonucleic Acid

• Nitrogen Based Molecules (4 Letters of DNA Alphabet)

• A pairs up with ____• G pairs up with ____

TC

Cell Cycle

• Stage 1: Interphase: Period before cell division occurs.

–Cell doubles in size

–Copy the DNA in its nucleus

Cell Cycle

• Stage 2: Mitosis

–One copy of the DNA is distributed into each of the two daughter cells

Cell Cycle

• Stage 3: Cytokinesis

–Cytoplasm divides

Cell Cycle Facts

• Some cells divides every 2 hours or less

• Human Liver cells divides every 22 hours

• There are about _____ million cells dividing in your body right now!!

• Most cells divide but human b_____ cells never divide.

100

rain

Cell Cycle Facts• Some cells divides

every 2 hours or less• Human Liver cells

divides every 22 hours

• There are about 100 million cells dividing in your body right now!!

• Most cells divide but human brain cells never divide.

Chromosomes

DNA Replication

• DNA looks like a spiral staircase “double helix”

• Two sides of DNA ladder are made up of sugar called deoxyribose and Phosphate

• Adenine always pairs with Thymine

• Cytosine always pairs with Guanine

Cancer

• What is Cancer

Mutation: Damage to the DNA

Cancer

• Cancer begins when mu________ disrupt the normal cell cycle causing cells to di_________ in an uncontrolled way

• Eventually a tu______ (a mass of abnormal cells) forms.

tation

vide

mor

How Cancer Spreads

Treating Cancer

• Surgery: Only effective during early stages

• Radiation: Radiation also destroy healthy cells

• Chemotherapy: Uses of drugs to kill cancer cells. Side effect: Also kills healthy cells.

Cancer Prevention

• 2/3 of all cancer deaths are caused by tobacco use or unhealthful diets

• Smoking is the main cause of lung cancer

Cancer Prevention

• Diet high in fat (fatty meats, fried foods) is harmful

• Diet that includes a lot of fruits, vegetables and grain products can lower some type of cancer.

Differentiation

• As cells differentiate, they become diff_____ from one another.

errent

Stem Cells

• Stem Cells respond to specific needs in the body by becoming a spec____zed ce___

ialill

Cell Cycle Quiz: Groups of 3 studentsp.132 & 133

Front of the card Back of the card

Name of the Phase: Mitosis: Prophase

1. Each student will create 2 cards2. The group will combine their cards to complete the

cell cycle3. Students in each group will quiz each other with their

flash cards4. Apprentices will come around and quiz and grade each

of the group