Microscopy The Cell Membrane The Endomembrane System Units

Microscopy, The Cell Membrane, & The Endomembrane System

Units of Cell Size UNITS METERS 1 millimeter (mm) 1 X 10 -3 m 1 micrometer (um) 1 x 10 -6 m 1 nanometer (nm) 1 X 10 – 9 m Eukaryotic cell: 10 – 100 um Prokaryotic cell: 2 – 10 um Virus. 02 – 0. 25 um (20 – 250 nm)

Types of Microscopes: Compound Light Microscopes vs. Electron Microscopes

Electron Microscopes: SEM TEM

Compound Light Microscopes

Calculating Total Magnification Total magnification = Magnification of Eyepiece X Magnification of Objective Lens

Calculating Linear Magnification = Size of the Image Actual Size of the Object Actual object size = Size of the Image Magnification The image size of this E. coli cell is 43 mm, and its actual size is 2 um. Using this information, calculate the magnification of the image.

Making a Wet Mount Slide With your group… 1. Create a wet mount slide of onion epidermal cells 2. Sketch what your cells look like under the microscope (make sure to include the magnification on your sketch) 3. Create a wet mount slide using salt water. Let your slide sit for 30 minutes before sketching and making observations!

The Cell Membrane Review: The Fluid Mosaic Model A B F C E D

Types of Transport Review 2 1

Endocytosis and Exocytosis

Endocytosis and Exocytosis: What other organelles are involved?

Endocytosis: A Closer Look Phagocytosis Pinocytosis (Cell Eating) (Cell Drinking) SOLID MATERIAL! RECEPTOR MEDIATED! LIQUID! NON-SPECIFIC! Amoeba phagocytosis Macrophage (white blood cell) phagocytosis Liver cells