Osmolarity the concentration of a solution expressed as the total number of solute particles per liter Hypertonic hyper more tonic solute A solution with an osmolarity that is hypertonic ID: 927991
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Slide1
Osmolarity
in the real world
Slide2Osmolarity
: the concentration of a solution expressed as the total number of solute particles per liter.
Slide3Hypertonic:
(hyper)= more(tonic)= soluteA solution with an osmolarity
that is
hypertonic will have a higher concentration of solute (and conversely less water) than inside the cell.This causes water through osmosis to leave the cell.
Animal cells placed in hypertonic solutions will undergo crenation (cell shrinking).
Slide4Hypotonic:
(hypo)= less(tonic)= soluteA solution with an osmolarity
that is
hypotonic will have a lower concentration of solute (and conversely more water) than inside the cell.This causes water through osmosis to enter the cell.
Animal cells placed in hypotonic solutions will undergo cytolysis (cell swelling)
Slide5Isotonic:
(iso)= equal(tonic)= solute
A solution with an
osmolarity that is isotonic will have an equal concentration of solute (and an equal amount of water) as inside the cell.
This causes water through osmosis to enter and leave the cell at the same rate (no net movement).Animal cells placed in isotonic solutions will behave normally.
Slide6This is why saline is given to patients in the hospital rather than pure water.
Organs being transported for transplants are also covered in saline for the same purpose.
Based on the saline drips above, what is the
osmolarity
of human tissues?
Slide7What organ do you think is most responsible for maintaining our normal
osmolarity?
Slide8Why the Kidneys of course!
(more on this later)