September 11, 2012 Standard: SAP1d-Relate cellular metabolism and transport to homeostasis and cellular reproduction. Warm-Up: Complete ARG 5.1 located on your desk. Read the paragraphs and answer the questions. Write the answers only in your composition notebooks.
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September 11, 2012 Standard: SAP1d-Relate cellular metabolism and transport to homeostasis and cellular reproduction. Warm-Up: Complete ARG 5.1 located.
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September 11, 2012
Standard: SAP1d-Relate cellular metabolism and transport to homeostasis and cellular reproduction.Warm-Up:Complete ARG 5.1 located on your desk. Read the paragraphs and answer the questions. Write the answers only in your composition notebooks.
Cell Physiology:Membrane Transport
Membrane Transport• Intracellular fluid – inside the cell
• Interstitial fluid – outside the cell; contains nutrition for the cell (amino acids, sugar, fatty acids, vitamins)
• A healthy cell must be able to extract what it needs from the interstitial fluid.
Passive Transport Mechanisms(require no energy)
A. Diffusion- solutes1. Molecules move from
concentrations
2. Substances move down their concentration gradient
3. Solutes -must be lipid-soluble or small.
4. O and CO2 move across the cell membrane through diffusion
B. Osmosis - diffusion of water through a selectively permeable membrane