Question

When RBCs are placed in ______% solution of pure sodium chloride, the corpuscles neither ______ nor ______ because ______ water is ______ to red blood corpuscles.

Answer 1

When RBCs are placed in 0.9% solution of pure sodium chloride, the corpuscles neither swell nor shrink because saline water is isotonic to red blood corpuscles.

Explanation:

When red blood cells (RBCs) are placed in a 0.9% sodium chloride (NaCl) solution, the concentration of solute outside the cells is the same as inside. This solution is called isotonic, meaning there is no net movement of water into or out of the cells. As a result, the RBCs maintain their normal shape and size. There is a dynamic balance of water exchange, preventing swelling or shrinkage.