Osmotic hyper and hypo regulators
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Biology students peed in a little cup to measure their rates of urine production after consumption of their favorite beverages – and their not so favorite beverages:
Beverage |
volumeingested |
urine output(ml/2 hr) |
[solute] (mM) |
[solute] (mOsm) |
hyper?hypo?iso? |
|
1 |
H2O |
800 ml |
~450 ml |
~ 0 |
~0 |
|
2 |
0.9% NaCl |
800 ml |
~300 ml |
155 mM |
310 mOsm |
|
3 |
9.0% NaCl |
80 ml |
~160 ml |
1550 mM |
3100 mOsm |
|
4 |
~12% Ethanol |
800 ml |
~800 ml |
~2600 mM |
~0 |
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For each beverage, indicate whether the beverage is hyperosmotic, hyposmotic, or isosmotic with respect to the blood.
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Which, if any, group above corresponds to:
– the responses of an osmotic hyper-regulator?
– the responses of an osmotic hypo-regulators?
– the responses of an osmoconformer?
SAMPLE ASSIGNMENT
