BIO202H5 Lecture Notes - Lecture 5: Countercurrent Exchange, Fluid Compartments, Osmotic Concentration
Document Summary
The salts in the tissue must be removed. Amphibious marine vertebrates have potassium co-transporters between the body and the external environment. The cytosol in the cells of any body is called intracellular fluid. Building up concentration on the outside of the cell. All of the pumps/channels are not doing exactly what they need to do, having a lot of them makes sure everything runs smoothly. Ability of chloride cell: depends on where they are placed, they will bring water in the animal or out of the animal. The fish have a mechanism to remove salts from icf: pulling ions from icf to build up concentration, once the concentration is built up, the chloride ions will help move it out of the cell. Rectal glands have a really narrow range of osmolarity: sharks control external environment, concentration of ions is different than external environment. There are more channels on the opposing direction.
