Osmoregulation Flashcards
Osmoregulation is a strategy that animals have to….
control ion and water balance
How do animals ensure that the properties of their extracellular fluids keep their cells happy?
osmoregulation
What is a solution?
combos of solvent (usually water and solutes)
what is the difference between molarity and osmolarity?
molarity: levels of a PARTICULAR solute
osmolarity: lumps ALL of the different solute and gets a different total (it is not particular)
Semipermeable membrane permit the movement of ___________ but not _________?
water, solutes
When two compartments are seperated by an osmotic gradient there is a tendacy for what?
to move around and neutralize those gradients
What is the osmotic pressure?
a force that it produced from the movement of water in response to osmotic gradients
When would the movement of solutes stop with a osmotic gradient?
once the osmotic pressure forcing water to the higher osmolarity equals the force of gravity trying to make the two sides the same
What matters to the cell is _______ not ________?
tonicity, osmolarity
Hyportonic solutions cause a cell to ______?
swell
Hypertonic solutions cause a cell to _______?
shrink
Describe tonicity.
describes the effects of a solution on a cell’s volume
Isosmotic means?
a solution having the same osmotic pressure as blood, when the osmolarity outside of the cell is equal to the osmolarity inside the cell (cell is isosmotic to the solution and solution is isosmotic to the cell)
You always talk about what a _______ does to a cell?
solutionn
tonicity always refers to the _______ around the cell
solution
what does hyperosmotic mean?
when extracellular fluid osmolarity is greater than that of the intracellular fluid
wha does hypoosmotic mean?
A solution will be hypertonic to a cell if its solute concentration is higher than that inside the cell, and the solutes cannot cross the membrane
In your tissues, the osmolarity of your blood and extracellular fluid, including interstatial fluid, is the same as…..?
the osmolarity of your cells
higher osmolarity outside the cells would……?
draw water from the cells
What would happen if cells were to shrink?
it would pull the cells away from each other, and tear their protein-protein connection and result in tissue damage and loss of integrity of the epithelial cells
Drinking too much water means your cells would find themselves in what type of solution?
hypertonic
What would our cells being in a hypertonic solution for too long cause?
cause the blood vessels and cells to be deprived of blood flow
What is ECF?
extracellular fluid
Osmoregulation is about how animals control ______ and _______ movement in and out of its ________?
ion, water, ECF