BIO310H5 Lecture Notes - Lecture 2: Osmotic Concentration, Connexon, Microvillus
Document Summary
Salmon are temperature conformers but chloride regulators. Blood cl concentration is not absolutely constant. Little higher when the fish are in seawater, than when they are in freshwater. Feedback is returned to a controller that regulates controlled variable with inversion of the error . Most regulation through nervous & endocrine system. The cell: stability of chemical reactions responsible for animal physiology is maintained within cells through the action of cell membranes, maintain cell integrity, control cell activities, electrical activity of cell membranes leads to cell-cell signaling. Helps continuous motion of molecules/layers going through membrane. Gasses pass through lipid bilayer very easily. Na ions have to enter cell & k ions have to exit for task completion. Non-polar: domains contain amino acids with hydrophobic side chains & are buried in lipid bilayer. Polar: domains contain hydrophilic amino acid side chains & project into aqueous media.
