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1.2Cells

1.2Cells. unicellular.- one cell Multicellular-many celled more complex and performs specialized jobs Cells of the same kind make tissues .. Tissues of the same kind make organs Organs work together to make organ systems.. organ systems make the organelle.

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1.2Cells

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  1. 1.2Cells • unicellular.- one cell • Multicellular-many celled more complex and performs specialized jobs • Cells of the same kind make tissues .. • Tissues of the same kind make organs • Organs work together to make organ systems.. • organ systems make the organelle

  2. Chapter 1.3 and 1.4 Cell Processespps. 22-27

  3. Elements and Compounds • Elements: any substance that cannot be broken down into a simpler substance (smallest part is an atom) • Compounds: two or more elements chemically joined together • smallest part of a compound is molecule • 1 C and 2 O CO2

  4. What compounds do cells need to survive? Pg. 24 • What are organic compounds? Compounds that contain carbon . • What are some organic compounds? Carbohydrates, lipids, proteins, nucleic acids What is a carbohydrate? Energy rich organic foods made up carbon, hydrogen, oxygen. Potatoes, rice, sugar, pasta, bread,

  5. Lipids • Made of carbon, hydrogen and oxygen. The cell membrane is made of lipids. Fats and oils and waxes are all lipids our bodies store for later use. • Proteins : made of carbon, hydrogen, • Oxygen, nitrogen, and sulfur. Great for increasing the cell’s functions and speeding up the enzymes for metabolism.

  6. Nucleic Acids • Long strands of organic molecules that contain information for cells to carry out life’s processes. DNA molecule DNA is shaped like a double Helix ( a rope twisted) and found in a cell’s Nucleus. There are chemical Codes on the rope ends.

  7. Water and Living things • Water does three things for our bodies: • Chemical reactions depend on it • Helps cells keep their shape • Changes the temperature slowly in an organism

  8. 1.4 The cell and its environment • The cell has a • to allow substances to move in and out of the membrane. It has a double layer of lipid molecules side by side. • The cell membrane is • Selectively permeable. • Video of processes

  9. Passive Transport: Diffusion and Osmosis • The movement of material across a membrane with no energy is called passive transport. • Two types: diffusion and osmosis • Diffusion: high concentration to a low concentration • video

  10. Osmosis • Osmosis: Diffusion of water across a cell membrane • Video • Active Transport: Molecules move from a lower concentration to a higher concentration • This requires energy • Video of active transport

  11. Moving Large Particles • Video of endocytosis • Video of exocytosis

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