AP BIOLOGY

LABORATORY REVIEW

DIFFUSION AND OSMOSIS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
In which case would a cell most likely lose water?
A
when placed in a solution containing a high salt concentration
B
when placed in a isotonic solution
C
when placed in a solution containing a low pH
D
when placed in a solution containing distilled water
Explanation: 

Detailed explanation-1: -If a cell is placed in a hypertonic solution, there will be a net flow of water out of the cell, and the cell will lose volume. 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.

Detailed explanation-2: -The cells will shrink if placed in a solution of sugar or salt in water due to osmosis. When an animal cell and plant cell will be kept in a solution of sugar or salt in water, the cell will undergo the process of osmosis.

Detailed explanation-3: -When a cell is placed in concentrated salt water (hypertonic solution), it is seen that cell has more water content than the salt solution. As a result, the water will move from its higher concentration to lower concentration without any expense of energy (passively).

Detailed explanation-4: -Water in cells moves toward the highest concentration of salt. If there is more salt in a cell than outside it, the water will move through the membrane into the cell, causing it to increase in size, swelling up as the water fills the cell in its imperative to combine with the salt.

Detailed explanation-5: -In a hypertonic solution, the net movement of water will be out of the body and into the solution. A cell placed into a hypertonic solution will shrivel and die by a process known as plasmolysis.

There is 1 question to complete.