A cell is placed in a 200 mMol NaCl solution.W. This solution is hypertonic.X. The solution will cause the cell to shrink.Y. The solution will have an osmolarity of 400mOsm/LZ. This solution will cause water to move out of the cellQuestion 21Select one:a.if only W, X and Y are correctb.if only W and Y are correctc.if only X and Z are correctd.if only Z is correcte.if all are correct
Question
A cell is placed in a 200 mMol NaCl solution.W. This solution is hypertonic.X. The solution will cause the cell to shrink.Y. The solution will have an osmolarity of 400mOsm/LZ. This solution will cause water to move out of the cellQuestion 21Select one:a.if only W, X and Y are correctb.if only W and Y are correctc.if only X and Z are correctd.if only Z is correcte.if all are correct
Solution
The correct answer is e. All are correct.
Explanation:
W. This solution is hypertonic. - This is correct. A hypertonic solution has a higher solute concentration than the inside of the cell. In this case, the 200 mMol NaCl solution is hypertonic to the cell.
X. The solution will cause the cell to shrink. - This is correct. In a hypertonic solution, water will move out of the cell (due to osmosis) to try and balance the concentration of solutes. This causes the cell to shrink.
Y. The solution will have an osmolarity of 400mOsm/L - This is correct. Osmolarity is a measure of solute concentration, expressed as mOsm/L. In a NaCl solution, each NaCl molecule dissociates into two particles (Na+ and Cl-), so a 200 mMol NaCl solution will have an osmolarity of 400 mOsm/L.
Z. This solution will cause water to move out of the cell - This is correct. As explained in X, water will move out of the cell in a hypertonic solution to try and balance the concentration of solutes.
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