BIOL 240W Lecture Notes - Marine Invertebrates, List Of Lakes By Volume, Osmoregulation
Document Summary
Homeostatic requirements: maintenance of plasma water volume, maintenance of plasma and cellular solute concentrations, removal of metabolic wastes, osmolarity. Total solute concentration of a solution measured in molarity. Internal water volume and solute concentrations will change with external conditions unless regulated i. ii. Internal osmolarity is the same as the. Internal osmolarity is held constant despite: osmoregulation requires energy, all organisms have a tolerance curve for external osmolarity i. ii. Tolerate only minimal changes in external osmolarity. Tolerate a wide range of external osmolarity. Osmoregulation strategies: marine invertebrates, marine bony fish, marine sharks i. Lower internal salt concentration compared to seawater (hyperosmotic to seawater: freshwater fish, terrestrial animals, transport epithelium. Layer of cells specialized for the regulation of solute movements. Types of excretory systems: protonephridia, metanephridia, malpighian tubules, vertebrate kidneys. Kidney function: regulation of extracellular fluid environment: volume of blood plasma, concentration of waste products in the blood, concentration of electrolytes in plasma, plasma ph.
