BIO 2110 Lecture 11: Lecture 11 - osmoregulation
2 Mar 2017
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Document Summary
Eg, ion balance is very important for ion potential. Balance uptake and loss of water and solutes. Important for homeostasis as well as waste excretion. Water through selectively permeable membrane to dilute concentration. Disassociation of ions is important (eg 1mol nacl = 2mol of solute) Solute exchange over gills, kidneys, skin in amphibians. Check slide for avenues of water and ion regulation (intake outtake, storage) Conformity and regulation similar to thermo conforming and regulating. Muscle is conformer, shrimp is regulator, green crab is mixed. Organisms that experience many concentrations are of interest. Marine to fresh to live, then back to marine to spawn. Fresh water --> marine for most of life. Survival of transfer between salinity , from fresh to salt. In experiment if you put frogs in a medium salinity, they have time to adapts. Gills actively secret nacl, monovalent ions over gills. Increase in the protein that mediates the salt transfer.
