ANATOMY

Detailed explanation-1: -If the cell was placed in hypertonic solution, water would have moved out of the cell causing it to shrink. Red blood cells do not have the cell wall and contractile vacuoles and hence, would not be able to maintain their shape leading to their rupture.

Detailed explanation-2: -When placed in a hypertonic solution, a red blood cell will lose water and undergo crenation (shrivel). Animal cells tend to do best in an isotonic environment, where the flow of water in and out of the cell is occurring at equal rates.

Detailed explanation-3: -When a red blood cell is placed in a hypertonic solution, it shrinks as water is drawn out of the cell and into the surrounding solution. If the same blood cellis placed in a hypotonic solution, the blood cell grows in size. Blood cells in isotonic solutions do not shrink or swell.

Detailed explanation-4: -If placed in a hypotonic solution, a red blood cell will bloat up and may explode, while in a hypertonic solution, it will shrivel-making the cytoplasm dense and its contents concentrated-and may die. In the case of a plant cell, however, a hypotonic extracellular solution is actually ideal.

Detailed explanation-5: -When red blood cells are placed in a hypertonic solution such as 4% sodium chloride solution (salt solution). water molecules diffuse out of the cell by osmosis. Water is rapidly lost. The red blood cells will shrink and probably die. This process is called crenation of red blood cells.