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Cell Membranes Osmosis and Diffusion

Cell Membranes Osmosis and Diffusion. AGENDA. Osmosis Lab: Based on your observations and lab procedures handout on the Naked Egg Experiment complete the individual lab report (lab station setup at the back of the room) and answer lab questions.

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Cell Membranes Osmosis and Diffusion

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  1. Cell MembranesOsmosis and Diffusion

  2. AGENDA Osmosis Lab: Based on your observations and lab procedures handout on the Naked Egg Experiment complete the individual lab report (lab station setup at the back of the room) and answer lab questions. After lab completion (textbook work) notebook check Complete 7-2 Section Assessment page 181 questions 1through 4 Complete 7-3 Section Assessment page 189 Questions 1 through 5 Homework Vocabulary : page 190

  3. AGENDA Osmosis Lab: Based on your observations and lab procedures handout on the Naked Egg Experiment complete the individual lab report (lab station setup at the back of the room) and answer lab questions. After lab completion (textbook work) notebook check Chapter 7 Assessment 1 through 10 page 197 Questions 12, 14, 15, 16, 19, 21, 22, 23,

  4. Functions of Membranes 1. Protect cell 2. Control incoming and outgoing substances 3. Maintain ion concentrations of various substances 4. Selectively permeable - allows some molecules in, others are kept out

  5. Phospholipid Bilayer

  6. Fluid Mosaic Model

  7. Solutions • Solutions are made of solute and a solvent • Solvent - the liquid into which the solute is poured and dissolved. We will use water as our solvent today. • Solute - substance that is dissolved or put into the solvent. Salt and sucrose are solutes.

  8. Methods of Transport Across Membranes 1. Diffusion 2. Osmosis 3. Facilitated Diffusion 4. Active Transport

  9. Methods of Transport Across Membranes 1. Diffusion -passive transport - no energy expended 2. Osmosis - Passive transport of water across membrane 3. Facilitated Diffusion - Use of proteins to carry polar molecules or ions across 4. Active Transport- requires energy to transport molecules against a concentration gradient – energy is in the form of ATP

  10. Diffusion • Movement of molecules from an area of high concentration to an area of low concentration. • Movement from one side of a membrane to another, un-facilitated

  11. Diffusion

  12. Osmosis

  13. Hypotonic Solution - One solution has a lower concentration of solute than another. • Hypertonic Solution - one solution has a higher concentration of solute than another. • Isotonic Solution - both solutions have same concentrations of solute.

  14. Plant and Animal Cells put into various solutions

  15. Types of Transport

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