Osmoregualtion Flashcards
extracellular fluid
fluid bathing the outside cell in multicellular organisms
what is osmoregulation
process where internal water and solute concentration maintains fluctuation in the external environment
what are organisms who regulate osmotic concentration called
osmoregulator
what are osmoconformers
organisms thats osmosis concentration is equal to their outside environment
what is it called when the body fluids of an organism are the same as the external environment
isotonic
kidneys function in osmoregulation
removal of nitrogenous waste, regulation of water concentration, maintaining ion levels in blood,
how does the body control water balance
by the control of water in urine
what happens when a person becomes dehydrated
osmoreceptors in the brain detects rise in osmotic pressure, hypothalamus sends messages to the pituitary gland to release ADH
what does ADH do
hormone carries to the kidney increases the permability of the cells
what happens when a large amount of water is drunk
osmotic pressure drops, osmoreceptors less stimulated, negative feedback reduces production of ADH
what special adaptation have xerophytes created
store water reduce water loss
what does the waxy cuticle do
reduces water loss, allows light to pass through
what does controlled water loss at the stoma do
restricts inward diffusion of CO2 and outward diffusion of O2
what does storing water in vacuoles do
stores water in cells of stem and leaves
what leaf shape helps is best for xerophytes
low area
