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Cellular Organization

Cellular Organization. Cytology. Cell Theory. Cells make up all life. Cells come from pre-existing cells. Smallest living unit. Maintain homeostasis. Cell Membrane. What it does : Lets things in/out Reacts to changes -- structural support What it’s made of: Phospholipid bilayer??

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Cellular Organization

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  1. Cellular Organization Cytology

  2. Cell Theory • Cells make up all life. • Cells come from pre-existing cells. • Smallest living unit. • Maintain homeostasis.

  3. Cell Membrane • What it does: • Lets things in/out • Reacts to changes -- structural support • What it’s made of: • Phospholipid bilayer?? • Proteins (maintain structure, help transport food/wastes)

  4. 2 kinds of Cells • 1. Sex cells:?? • 2. Somatic Cells:?? • Body has trillions of cells in different shapes and sizes.

  5. Mitochondria • Where ATP (energy) is made. • 2 steps to make ATP • 1. glycolysis: glucose -> pyruvic acid • 2. Kreb: pyruvic acid -> ATP

  6. DNA • In the nucleus; determines how you look • Made of nucleotides : S,P,N • 4 Nitrogenous bases: A,T,G,C • How protein is made: DNA-> RNA -> protein • Transcription?? • Translation??

  7. Cell Transport • Cell is selectively permeable (size) • Diffusion:?? • Osmosis:?? • Facilitated Diffusion:?? • Active Transport:?? • Endocytosis • Exocytosis

  8. Cell environments • Hypotonic: watery environment?? • Hypertonic: little water in environment?? • Isotonic: same amt in/outside of cell??

  9. Cell Division • Mitosis: somatic cells, only 1 division • Meiosis: sex cells, 2 divisions • Leave a big space here because after notes you will draw the stages of mitosis and meiosis!! (look on page 270-271 and 301)

  10. More on cell growth • Cell growth is regulated by chemicals and genes • Cancer: abnormal cell division that creates a tumor. • Benign: will not spread • Malignant: can spread; caused by oncagenes

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