BIOL 1202 Chapter : Chapter 44
Document Summary
Concept 44. 1: osmoregulation balances the uptake and loss of water and solutes. **inside a cell you construct, you place a 1m sugar solution. You place the cell in a 2m sugar solution. What happenes? (water enters the cell faster than it leaves, water leaves the cell faster than it enters, water leaves and enters at the same rate, sugar diffuses into the cell) Osmosis: osmosis: the movement of water across a selectively permeable membrane, water moves from an area where solute concentration is low to an area where solute concentration is high, special case of diffusion, fig. 44. 2, hypoosmotic side-high conc. Osmolarity: solute concentration expressed al molarity (i. e. , moles/l, we want a isoosmotic solution surrounding the cell, not hypoosmotic or hyperosmotic. Isotonic to their surroundings, do not regulate the osmolarity: osmoregulators, use unergy to control uptake and loss of water\ Meeting osmotic challenges: marine bony fishes, hypoosmotic to sea water.
