11/18 & 11/19 - 7 th grade agenda collect hw: reading & note taking p.79 – 80 cell...

11/18 & 11/19 - 7th Grade Agenda

Collect HW: Reading & Note Taking p.79 – 80 Cell Differentiation, Stem CellsBrainpop: Stem Cells & Specializations & CancerChap 4 Study GuideMicroviewer Lab (Cell Structures)Class Reading p.135-141HW: Reading & Note Taking p.81 – 84Reminder: Chap 4 Test on 11/30 & 12/1

Reflection

• Prompt: Draw the Cell Cycle and label each phase.

Lunch with a Scientist

• Friday Nov 19th: Mud flowing down burn areas

• Room 235

• 3 points Extra Credits for attending and writing a summary with 10 facts that you learned in the meeting.

• You can write the facts as bullet points.

Cell Cycle

Interphase Prophase

Metaphase

AnaphaseTelophase

Cytokinesis

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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

Reflection

• Prompt: Write 3 facts that you learned watching the Brain pop video.