1. A dehydrated patient arrives in the ER. The doctor instructs you to start an
ID: 92626 • Letter: 1
Question
1. A dehydrated patient arrives in the ER. The doctor instructs you to start an IV of a 0.9% saline solution. Would you be concerned with the doctor’s orders?
Yes, you know red blood cells will swell and burst in this solution
Yes, you know red blood cells will shrink in this solution
Yes, you know that this solution will not treat the condition but make it worse by causing the patient to dehydrate further.
No, you know red blood cells will neither shrink nor swell if placed in this solution
No, the doctor is right, do what he says no matter the situation (if he is wrong it is his fault)
2. A cell contains 10 blue dye molecules. The liquid around the cell contains 0 (zero) blue dye molecules. If the cell membrane were permeable to the blue dye, what would happen? SELECT ANY ANSWERS THAT ARE ACCURATE.
Dye molecules could leave the cell
Dye molecules could enter the cell
The dye molecules would diffuse until equilibrium was reached.
All of the dye molecules would be found in the SOLUTION and NO dye molecules would be found in the cell.
All of the dye molecules would be found in the cell and NO dye molecules would be found in the solution
3. Which statement(s) correctly describe PASSIVE membrane transport? SELECT ANY STATEMENTS that describe PASSIVE TRANSPORT.
Allows a substance to 'move' down its concentration gradient
Allows water to move from an area of low concentration to an area of higher (water) concentration.
Requires ATP
Allows a substance to 'move' up (against) its concentration gradient
4. A cell contains 10 blue dye molecules. The liquid around the cell contains 0 (zero) blue dye molecules. If the cell membrane were NOT permeable to the blue dye, what would happen? SELECT ANY ANSWERS THAT ARE ACCURATE.
All of the dye molecules would be found in the cell and NO dye molecules would be found in the solution.
All of the dye molecules would be found in the SOLUTION and NO dye molecules would be found in the cell.
The dye molecules would diffuse until equilibrium was reached.
Dye molecules could enter the cell
Dye molecules could leave the cell
Explanation / Answer
1) When intravenous saline is infused, the body solutions become hypertonic. Since hypertonic solution contains higher solute concentrations, red blood corpuscles when placed in hypertonic solution (0.9% saline), the cells will loose water as a result of osmosis. The movement of water out of the cells will cause red blood corpuscles to shrink in this solution (option b).
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