12/2 & 12/3 - 7 th Grade Agenda

12/2 & 12/3 - 7th Grade Agenda Collect HW: Workbook p.77-78 Cell Cycle Quiz Brain Pop: Respiration Cell Video Video: Bill Nye Respiration Class Reading p.129-134 HW: Workbook p.79 – 80

Mitosis Animations & Movie • http://microscopy.fsu.edu/primer/java/scienceopticsu/powersof10/index.html • http://www.mybiology.com/archive_movies/the_cell_movies.htm • http://www.cellsalive.com/mitosis.htm • http://www.cellsalive.com/cell_cycle.htm • http://www.pbs.org/wgbh/nova/baby/divide.html# • http://www.contexo.info/DNA_Basics/mitosis%20movie.htm

Cell Cycle ? Interphase Prophase ? ? Cytokinesis Metaphase ? Telophase Anaphase ? ?

Interphase • Stage 1: Interphase: Period before cell division occurs. • Cell is doing its J___ while growing (doubles in size) • Replicates (make a copy) its DNA ob

Mitosis : Prophase Prophase: Identical Chromatids p______. They are held together by a centromere air up

Mitosis : Metaphase Metaphase: Chromosomes line up in the m______ iddle

Mitosis : Anaphase Anaphase: The centromeres split and the chromosomes are pulled a______ part

Mitosis: Telophase Telophase: Each set of chromosomes are F___ away and a nucleus forms around them ar

Cytokinesis Cytokinesis The cell membrane m______ inwards then pinches in two. This form 2 identical cells oves

DNA – Deoxyribonucleic Acid • Nitrogen Based Molecules (4 Letters of DNA Alphabet) • A pairs up with ____ • G pairs up with ____ T C

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 tation • 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. 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 different from one another they also form groups made of other, similarly specialized cells. These groups then form tissues and organs

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___ iali ll

Cell Cycle Quiz: Groups of 3 students Back of the card Front of the card Name of the Phase: Mitosis: Prophase Summary of the Phase: Spindle Fiber, Centromere & Chromatids form. • Each student will create a card • The group will arrange their cards in order • Students in each group will quiz each other with their flash cards • Apprentices will come around and quiz and grade each of the group

12/2 & 12/3 - 7 th Grade Agenda