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Homework

Homework. Page 108 Understanding Key Concepts #5-#10. Character Education. We can always learn more and we normally will learn more . Objectives. Describe diffusion Describe the diffusion of water (osmosis)

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Homework

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  1. Homework • Page 108 Understanding Key Concepts #5-#10 Lesson 12 Honors Biology

  2. Character Education • We can always learn more and we normally will learn more Lesson 12 Honors Biology

  3. Objectives • Describe diffusion • Describe the diffusion of water (osmosis) • Review how a cell brings in and expels necessary substances needed to carry on life Lesson 12 Honors Biology

  4. Class Notes • Plant cells, bacteria, and fungi cells have cell walls • Chloroplasts and mitochondria have their own DNA for reproducing more copies of themselves • Diffusion takes place from an area of high concentration to an area of lower concentration in a fluid • As a result of diffusion concentrations on each side of a membrane eventually become balanced Lesson 12 Honors Biology

  5. Class Notes continued • Facilitated diffusion is a type of diffusion that is sped up. Channels work in both directions and they concentrate molecules around them so normal diffusion is sped up. • Active transport requires energy an example is moving the potassium ion across the cell membrane • Plant cells in a hypotonic solution will cause the cells to take in water • Plant cells in a hypertonic solution will cause the cells to loose water (loss of turgor pressure) Lesson 12 Honors Biology

  6. Project Item / film Project Item # 8 Osmosis / diffusion Films 16mm osmosis # 85, Bill Nye fluids 43.1 Project Item # 11 hyper/hypo/isotoinc Films 327 cells, stuctures,water pre-recorded 17min Get dry ice from Publix Elodea cells, red onion cells hyper/hypo digital microscope Lesson 12 Honors Biology

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