Tonicity & Effects on Cells
Tonicity (relative concentration inside vs. outside the cell)
In this lesson, you will learn about tonicity. There are three forms of tonicity: isotonicity, hypotonicity, and hypertonicity.
How concentrated is the cell compared to it's environment? You must understand this fundamental question.
Instructions - complete the following
Read Inquiry into Life text pg. 71-79
Watch these short videos
Video - an Egg in a Hypertonic Solution (to 55 sec's)
Video - an Egg in a Hypertonic Solution (56 sec's to end)
Video - Lettuce in a Hypotonic Solution
Observe the effects of tonicity on red blood cells
Shriveling (crenating) red blood cells
Red blood cells swelling and lysing (bursting)