AP Bio - Tonicity and water potential

tonicity

the ability of an extracellular solution to cause a cell to gain or lose water

osmoregulation

cells must be able to regulate their solute concentration and maintain water balance

isotonic

water enters and leaves at an equal rate

hypertonic

water leaves at a higher rate

hypotonic

water enters at a higher rate

water potential

prediction of where water will flow

high to low concentration

water flows from