Is 0.9 NaCl a hypertonic solution?
No it's an Isotonic solution
I guess that depends on what you are comparing the solution to? In comparison to human blood, it is most certainly a hypertonic solution, because there is a much higher concentration of Na+ and Cl- in the solution than in the blood. An isotonic solution would only be 0.89% NaCl. See related link for more details.
Saline solution with a highter concentration the 0.9% are hypertonic as are soutions that contain 10% dextrose. Combinations of hypertonic solutions are 0.9% NACl with 5% Dextrose or higher. These solutions when given IV will draw fluid out of the cells or intersticial tissues and into the blood stream then ideally will be forced through the kidneys into the urine for evacuation. If a person has overhydration, or edema a hypertonic solution may be used…
When a cell is put in a hypertonic solution, it shrinks and shrivels. You alwasy have t say: This solution is hypertonic to ...A hypertonic solution means that there is more matter in the solution than in the object it is compared to. The cell will shrink and shrivel because the water will leave the cell to try to dissolve the matter outside of it.
I will take the cell to be animal cell. The hypertonic solution is taken as hypertonic saline solution. The cell will shrink in that case. There will be loss of water to the exterior of the cell. The biochemical cellular functions will be adversely affected. The cell may die if the solution is sufficiently hypertonic.