Active vs Passive Transport

Place the following into either active or passive transport Passive Transport Does not require energy Goes with the concentration gradient Molecules move from high to low concentrations Active Transport Does require energy Moves against the concentration gradient Molecules move from a low area of concentration to a high area of concentration Match the type of transport with the appropriate definition Osmosis The diffusion of water from high to low Diffusion diffusion of molecules from high to low Active Transport The cell needs to use energy to move particles from low to high concentration Cell Membrane Separates cell's Cytoplasm from the outside environment. This is where particles can enter and leave the cell Equilibrium A term used meaning the reaching the "same" on both sides of the cell membrane. Also called "Homeostasis". Use the word bank to fill in the blanks within the short reading. Homeostasis and Cell FunctionFor a cell to function normally, a stable state must be maintained inside the cell. For example, the concentration of nutrients must be kept within a certain range for the cell to survive. The process of maintaining stable conditions inside a cell (or an entire organism) is homeostasis. Homeostasis requires adjustments, because conditions are always changing both inside and outside the cell. The processes of passive and active transport play important roles in maintaining homeostasis. By moving substances into and out of cells, they keep conditions within normal ranges inside the cells and the organism as a whole. Science Experiment- Diffusion Through a Membrane Iodine turns blue in reaction to starch. When a starch solution is placed in dialysis tubing (a semi-permeable membrane) and the tubing is added to a beaker of iodine , will the starch be able to pass through the tubing and turn the water blue or will the smaller iodine molecules pass through and turn the contents of the tube blue?Watch the video and then answer the following question in the discussion section, "What did you observe the bag doing during the experiment? Why do you think that occurred? What type of cell transport does this illustrate?"