BIO 1306 Lecture Notes - Lecture 10: Osmoregulation, Osmotic Concentration, Nephron
Document Summary
______________ controls solute concentrations and balances water gain and loss. Desert and marine animals face desiccating environments that can quickly deplete body water. Freshwater animals survive by conserving solutes and absorbing salts from their surroundings. ______________ rids the body of nitrogenous metabolites and other waste products. Concept 44. 1: osmoregulation balances the uptake and loss of water and solutes. Osmoregulation is based largely on balancing the uptake and loss of water and solutes. The driving force for movement of solutes and water is a concentration gradient of one or more solutes across the plasma membrane. ______________, consisting only of some marine animals, are isoosmotic with their surroundings and do not regulate their osmolarity. ______________ expend energy to control water uptake and loss in a hyperosmotic or hypoosmotic environment. Most animals are stenohaline; they cannot tolerate substantial changes in external osmolarity. Euryhaline animals can survive large fluctuations in external osmolarity. Adaptations to reduce water loss are key to survival on land.
