Concentration salt solution is a hypertonic solution (water concentration lower as compared to the cell) therefore it causes exosmosis. The outward movement of water from the cell results in irritation and excessive dehydration. This results in reverse movements and hence, vomiting.
- As salt solution contains more solutes than nearby tissues, then the water from those tissues start moving to intestine.
- This process is endosmosis in which the water molecules move from lower solute concentration to higher solute concentration through intestinal wall.
- Intestine cannot tolerate strain due to extra incoming water and hence, the extra water is spilled out through vomiting.