AP BIOLOGY

Detailed explanation-1: -THE SLUG has a moist skin, so when you sprinkle salt on to it a strong brine quickly forms. The process of osmosis then begins, by which water is drawn from a weak solution (in this case the body fluid of the slug) into a stronger one. Result: the slug dies a lingering death by dehydration.

Detailed explanation-2: -Rather than by a complex chemical reaction, salt acts as a snail and slug’s kryptonite by dehydrating its slimy exterior. “Salt essentially draws the water out of their skin – an osmosis effect – and they die within minutes of dehydration, ” says Dr Gordon Port, senior lecturer at Newcastle University.

Detailed explanation-3: –The salt and moisture on the outside of the slug cause an isotonic state, and the water leaves the slug quickly by osmosis is incorrect because the salt and moisture will result in a hypertonic solution, not isotonic.

Detailed explanation-4: -The water will rush out of the slug’s cells via osmosis from an area of high concentration inside the cells to low concentration outside in an attempt to reach an isotonic state. This will cause the slug’s cells to shrivel and ultimately the slug will die of dehydration.

Detailed explanation-5: -The poor slug, sacrificed for science by many young nature lovers around the world. Obviously this happens as the outside solution is hypotonic and the inside of the slug’s cells are hypertonic. Energy is used for active transport leading to osmosis.