Tonicty & Cells

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

1. Read Inquiry into Life text pg. 71-79
   
   

2. Lesson on Tonicity

3. Notes - Download
   
   

4. 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

5. Observe the effects of tonicity on red blood cells

Shriveling (crenating) red blood cells

Red blood cells swelling and lysing (bursting)