AP BIOLOGY

LABORATORY REVIEW

DIFFUSION AND OSMOSIS

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
A cell that has an internal solute concentration equivalent to the solute in the solution it resides is called ____
A
hypertonic
B
hypotonic
C
isotonic
D
heterotonic
Explanation: 

Detailed explanation-1: -In such a solution, the concentration of solute is the same as the concentration of solute inside the cells. Complete answer: Isotonic solutions are those solutions which contain equal concentrations of impermeable solutes on either side of the membrane, due to which the cell either swells or shrinks.

Detailed explanation-2: -Solutions that contain the same concentration of water and solutes as the cell cytoplasm are called isotonic solutions.

Detailed explanation-3: -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.

Detailed explanation-4: -Hypotonic has a lower concentration of fluid, sugars and salt than blood. Hypertonic has a higher concentration of fluid, sugars and salt than blood. Isotonic has similar concentration of fluid, sugars and salt to blood.

Detailed explanation-5: -If the concentration gradient between two solutions is effectively zero, they are said to be isotonic.

There is 1 question to complete.