Question

In brief state what happens when-

A. Red blood cell is kept in concentrated saline solution.

B. Cells of onion peel are kept in hypotonic solution.

Answer 1

a) When a Red Blood Cell is placed in a concentrated saline solution exosmosis occurs (i.e. the passage of water through a cell membrane into the surrounding medium) and the RBCs shrink due to excess loss of water.
b) if an onion peel is kept in a hypotonic solution, water will enter the cells of that onion peel through osmosis(i.e. as the medium of water outside the cell is more, it enters into the cell through osmosis). In this case the cell is likely to swell up.