AP BIOLOGY

THE CELL

TRANSPORT INTO AND OUT OF THE CELL

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Both side of a selectively-permeable membrane are equal. The sides are ____
A
isotonic
B
hypertonic
C
hypotonic
Explanation: 

Detailed explanation-1: -An isotonic solution is one with a salt concentration that is exactly equal to that of blood cells. If the surrounding solution has the same salt concentration as the solution inside the cell, the surrounding solution is referred to as isotonic.

Detailed explanation-2: -An isotonic solution has the same solute concentration compared to the intracellular solute concentration. When a red blood cell is placed in an isotonic solution, there will be no net movement of water.

Detailed explanation-3: -An isotonic solution is defined as two solutions of equal concentrations of solutes and water separated by a semipermeable membrane to allow water to move freely in and out of a cell. Learn the definition of an isotonic solution and explore real-world examples of it.

Detailed explanation-4: -If a cell is placed in an isotonic solution, there will be no net flow of water into or out of the cell, and the cell’s volume will remain stable. If the solute concentration outside the cell is the same as inside the cell, and the solutes cannot cross the membrane, then that solution is isotonic to the cell.

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