AP BIOLOGY

ANIMAL PHYSIOLOGY

OSMOREGULATION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
In an isotonic solution which way will the water flow
A
it will not flow at all
B
it will flow into the cell
C
it will flow both ways at equal rates
D
out of the cell
Explanation: 

Detailed explanation-1: -An isotonic solution is any external solution that has the same solute concentration and water concentration compared to body fluids. In an isotonic solution, no net movement of water will take place.

Detailed explanation-2: -Isotonic means a solution with the same concentration as the cell. Hence water will move in and out of the cell at equal rates, so that the net movement of water is zero.

Detailed explanation-3: -Water moves by osmosis from an area of low solute concentration to an area of high solute concentration through a membrane that is selectively permeable. If the cell and the solution are isotonic, this means that they have the same solute concentration. There will be no net flow of water between the cell and solution.

Detailed explanation-4: -An isotonic solution is one that has the same osmolarity, or solute concentration, as another solution. If these two solutions are separated by a semipermeable membrane, water will flow in equal parts out of each solution and into the other.

Detailed explanation-5: -Answer and Explanation: When a cell is hypotonic, water flows out of the cell. The hypotonic cells possess higher water potential when compared to the outside environment.

There is 1 question to complete.