Blood Glucose Strips

Just-Me asked:


1.A dialysis membrane separates two different sucrose solutions (sucrose dissolved in water):

* Solution A contains a 30% sucrose solution.
* Solution B contains a 15% sucrose solution.

Which of the following best predicts the movement of water molecules through the membrane?

A.)Water molecules will move equally from Solution A into Solution B and from Solution B into Solution A.
B.)Water molecules will not pass through the membrane.
C.)Water molecules will move in both directions through the membrane, but more water molecules will move from Solution A into Solution B than from Solution B into Solution A.
D.)Water molecules will move in both directions through the membrane, but more water molecules will move from Solution B into Solution A than from Solution A into Solution B.

2.If you wanted water to experience a net flow out of a dialysis bag filled with a 50% solution of sucrose, what would the minimum concentration of the beaker solution need to be?

A.The beaker solution concentration would have to be greater than 50%.
B.The beaker solution concentration would have to be 50%.
C.The beaker solution concentration wouldn’t really matter, since water can flow freely into and out of the bag.
D.The beaker solution concentration wouldn’t really matter, since sucrose cannot move out of the bag.

3.A dialysis membrane separates two different solutions:

* Solution A contains glucose dissolved in water.
* Solution B contains starch dissolved in water.

The molecular weight of the starch molecules is greater than that of the glucose molecules. Which of the following is most likely to occur?

A.Both sugar molecules and starch molecules will pass through the membrane, but water molecules will not.
B.Both starch molecules and water molecules will pass through the membrane, but glucose molecules will not.
C.Only sugar molecules will pass through the membrane; neither starch molecules nor water molecules will pass through the membrane.
D.Both sugar molecules and water molecules will pass through the membrane, but starch molecules will not.

4.Two potato strips were cut from the same potato. Each strip was placed in a salt water solution. Strip A was placed in a solution containing 20% salt; Strip B was placed in a solution containing 40% salt. How would the two strips be expected to compare in volume at the end of one hour in the respective salt solutions?

A.Strip A should have a greater volume then Strip B.
B.The volumes of the two strips should be equal.
C.Strip B should have a greater volume then Strip A.

KIRSTIN