cell structure and function
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Cell Structure and Function. Chapter 3. DO NOW. Type 2 Writing 3 minutes Write 3 things you learned/remembered from last night’s reading. Announcements. Some tests have been graded Check period grades are due Monday Office hours Wed/Thurs 6:30 – 8 - PowerPoint PPT PresentationTRANSCRIPT
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Cell Structure and FunctionChapter 3
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DO NOW Type 2 Writing 3 minutes
Write 3 things you learned/remembered from last night’s reading
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Announcements Some tests have been graded Check period grades are due Monday
Office hours Wed/Thurs 6:30 – 8 Use study hall / Office hours to complete test
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History of the Cell 1838 – Matthias Schleiden concluded all plants are made of
cells 1839 - Theodor Schwann stated all animals are made of cells 1855 – Rudolf Virchow concluded new cells can only be
created through division
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Cell Theory All things are made up of cells Cells are the basic units of structure and function in living
things New cells are produced from existing cells
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Modern Cell Theory Energy flow occurs inside of cells Genetics (DNA) passes between cells All cells have the same basic chemical make up
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Anatomy of a Cell Nucleus
Nucleoli Chromatin
Turns to chromosomes Plasma Membrane Cytoplasm
Mitochondria Ribosomes Endoplasmic Reticulum Golgi Apparatus
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Nucleus “headquarters” of cell Contains DNA
For +2, what does DNA stand for? Contains:
Nucleoli Create Ribosomes which synthesize proteins
Chromatin Turns to chromosomes when dividing Not dividing: protein and DNA
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Chromosomes Contains DNA Split to convert genetic material Encode genetic material
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Plasma Membrane Also Cell Membrane Also protects and supports Strong but flexible Selectively permeable
Microvilli Absorption
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Cytoplasm Gel-like substance outside of the nucleus 70-90% water
Mitochondria Ribosomes Endoplasmic Reticulum Cytoskeleton
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Mitochondria This is where oxygen is used to help break down food
“Energy source” of the cell As food is broken down, energy is released ATP is created
Provides energy for cellular work Liver and muscle cells have hundreds of mitochondria to
supply energy needs
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Ribosomes Protein synthesis
Contains messages for other cells to carry out work
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Endoplasmic Reticulum Rough and Smooth Provides channels to carry proteins from one part of the cell
to another Rough ER
“studs” of ribosomes Push proteins out to be transported
Smooth ER Liver has many Smooth ERs to break down cholesterol and fat
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Vesicle “Small bubbles” Metabolism, transport and storage
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Cytoskeleton Groups of protein filaments Maintain shape Involved in movement
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Cell Diversity (pg.73-75) Cells connect body parts
Fibroblasts Erythrocytes (RBCs)
Cells the cover and line body organs Epithelial cells – Sheets like a honey comb
Cells that move organs and body parts Skeletal muscle / Smooth muscle
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Cell Diversity (pg.73-75 Storage Cells
Fat cells Fight disease
Macrophage – digest infectious microorganisms Gather info and control body function
Nerve cells – receives and transmits messages Reproduction
Oocyte (female) Sperm (male)
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Homework Read 63-71 (stop at “Cytoskeleton)