AP BIOLOGY

THE CELL

TRANSPORT INTO AND OUT OF THE CELL

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
When a cell is placed in a hypotonic solution (less concentrated), water
A
moves from the inside of the cell to the solution
B
moves from the solution to the inside of the cell
C
moves equally in and out of the cell
D
none of these
Explanation: 

Detailed explanation-1: -In hypotonic solutions, there is a net movement of water from the solution into the body. A cell placed into a hypotonic solution will swell and expand until it eventually burst through a process known as cytolysis.

Detailed explanation-2: -In a hypotonic solution, the solute concentration is lower than inside the cell. The prefix hypo means under or below in Latin. Under these conditions, the osmotic pressure gradient forces water into the cell. Depending on the amount of water that enters, the cell may look enlarged or bloated.

Detailed explanation-3: -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-4: -Explanation: the hypotonic solution has a higher water potential than that of the cell, so water will enter the cell from a region of higher water potential to a lower water potential down a water potential gradient across a partially permeable membrane via osmosis.

Detailed explanation-5: -When a cell placed in hypertonic solution (has more solutes that cell), the cell will shrink because water moves out, firstly from the cytoplasm and then from the vacuole.

There is 1 question to complete.