Cells in Hypotonic and Hypertonic Solutions Animal Cells

Cells in Hypotonic and Hypertonic Solutions

Animal Cells Under a Microscope

Animal Cells Under a Microscope Human Cheek Cells in Tap Water 100 X Human Cheek Cells in Tap Water 400 X

Plant Cells Under a Microscope Onion Cells in Tap Water 220 X 100 X

diffusion the random movement of molecules from areas of high concentration to areas of low concentration

osmosis a type of diffusion in which water tends to pass through a semipermeable membrane into a solution where the solvent concentration is higher, thus equalizing the concentrations of materials on either side of the membrane

Vocabulary hypertonic solution any solution with a higher solute concentration than normal body cells so that water flows out of the cells by osmosis a liquid mixture with one substance evenly dissolved in another (usually water) “high solutes outside, water flows out” hypotonic any solution with a lower solute concentration than normal body cells so that water flows into the cells by osmosis “low solutes outside, water flows in” solute the substance that is dissolved in a solution solvent the substance that dissolves another substance in a solution (water is the “universal solvent”)

Lab Instructions and Procedures Read them! Following are the basic lab directions for “Cells in Hypotonic and Hypertonic Solutions. ” 1 st sentence: DIRECTIONS: Write the lab title on the top line of your paper. 2 nd sentence: Follow the rules for a biological drawing when sketching cells. 3 rd sentence: Be certain to include total magnification, size estimate, and a title for sketches. 4 th sentence: Use a circle maker to show the field of view. 5 th and 6 th sentences: Answer all questions using complete sentences! RESTATE the question in your answer; in other words, do not use pronouns like “it. ”