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