7. How do osmotic power plants work?
8. Research the structure that protect plant and animal cells from damage resulting from, osmotic pressure. Write a few paragraphs explaining what they are, how they work and where they are located. According to the National Center for Biotechnology Information; this is because of “channels.” These forms of transport allow for the movement of material in and out of the cell protecting it from the building of osmotic pressure. Osmotic pressure is the cells ability to move water from another source into itself, causing the pressure (1970). Understanding that osmosis is the movement of water through a semi- permeable membrane we can find examples of this in both plant and animals; one in specific, is in plants the cell wall (1970). The cell wall can be fortified with a secondary inner cell wall protecting the cell from bursting due to the osmotic pressure. In animal cells we can look at the kidneys, which contain aquaporin’s. As indicated by Open Stax; aquaporin is the “channel protein” that allows for water to pass through a membrane at a high rate. An organ that does this in animals is the kidneys (2013). Predictions/hypothesis Experiment one: If red and blue dye is dropped into corn syrup the molecular weight will affect the rate of dispersion then it can be observed that the lower molecular weight of the red dye will allow it to permeate and spread faster. Experiment two: If the dialysis tube is set into a beaker of fresh water then it will result in the substance within it to permeate out of the tube and into the clean water. Experiment three: If the volume inside the dialysis is greater or less then original then the semipermeable membrane is allowing the solution to come through or permeate. Experiment four: If the samples of potato are left to permeate in different solutions then the result will differ from water and salt water solutions, for example the salt water may soften the potato. Materials and Methods Experiment 1: Material - 60 mL Corn syrup bottle - Red and blue dye solutions (Blue weight = 793g/mole Red weight = 496g/mole) - 9 cm petri dish - Ruler - Stopwatch - Tape
Zoe Kouremenos Procedure: 1. Use the tape to secure the one half of the petri dish over a ruler. Make sure to line up the measurement on the ruler through the dish. Dish should be facing upward.
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- Fall '16
- Lon Vanwinkle