1. The cell and Osmosis Lab #4 Prof. Santos LaGuardia Community College

2. The cell Basic unit of life All living things are made up of cells All cells come from previous cells Cells are the basic structural and functional units of life!

4. Differences between plant and animal cell 1- shape 2- presence of chloroplast 3- central vacuole 4- presence of cell wall 5- presence of centrioles

5. 2 types of cells Eukaryote and prokaryote

6. Aim: Lab #4 assignments Assignment Make a wet mount of an onion epidermal section and stain with Iodine. Look under low and high power. Complete item 3 on lab report 3 on page.

8. Assignment Make a wet mount of your cheek cells and stain with methylene blue! Look under both low and high power. Complete item 5 on lab report 3.

10. Movement of materials across membrane 1- passive transport- movement of materials from high to low concentration 2- active transport- movement of materials from low to high concentration 3- diffusion- movement of small molecules from high to low concentration

11. Osmosis The movement of water from a region of high concentration to low concentration.

12. Comparing hypo, hyper and isotonic solutions 1- hypertonic - more solute 2- hypotonic – less solute 3- isotonic- - equal amounts of solute