ZOO 3210 Final: OSMOREGULATION PART TWO

• School: University of Guelph
• Department: Zoology
• Course: ZOO 3210
• Professor: Jim Ballantyne

Document Summary

Influx of sodium, chloride, and water in seawater and loss of urea: efflux of sodium, chloride and urea in freshwater and gain of water. Aquatic environment teleosts: they are osmoregulators and control the osmolarity of their bodily fluids different from that of their environment, this means that in seawater, there is an influx of sodium chloride. In freshwater, they lose salt and take on water: in order to maintain these concentrations they need to be able to adjust osmotically. What needs to be done: move nacl out in seawater and move nacl in in freshwater. What cells are involved: chloride cells aka mitochondrial rich cells. What transporters are involved: need to be able to deal with the amount of salt that needs to be moved. Cell types: chloride cells are incredibly rich in mitochondria, have an apical crypt facing the water, and have an extensive tubular system for moving things from the blood to the water.