30. Its about concentration The concentration of the solution, with respect to other solutions is important Isotonic --- when both solutions have the same concentration of dissolved substances Hypertonic --- a solution with a higher concentration of dissolved substances Hypotonic --- a solution with a lower concentration of dissolved substances
35. Diffusion Diffusion is the passive movement of particles from a high concentration of particles to a lower concentration until they are spread out evenly Smell Particles & Air Particles Solution Smell Particles diffused evenly into the Air Particles
46. Glucose Cell membrane Transport protein Glucose binds to the transport protein The transport protein turns over and releases glucose onto the inside of the cell, along the concentration gradient Concentration gradient
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48. Carrier molecule Cell membrane Transport protein The carrier molecule binds to the transport protein, which opens the pore allowing it to move through the cell membrane. The pore closes once the carrier is inside the cell. Concentration gradient It is possible to stop the action of transport protein with drugs which will block the pore.
54. Class Activity: Correctly Label Weak Solution Strong Solution Solute Molecule Water Molecule Partially Permeable Membrane Which way will the water flow???
58. Plasmolysis in Elodea Plasmolysis in Elodea: http://www.mrphome.net/mrp/Membrane_Transport.html
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61. Salt ion Cell membrane Transport protein Ion binds to the transport protein The transport protein turns over and releases the ion onto the inside of the cell, against the concentration gradient Concentration gradient Energy is used
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63. Pseudopodia extend to engulf food A food vacuole is formed Pinocytosis works the same, but with no food, only liquid How Endocytosis works