Cell Structure and Function Grade 7 Chapter 1 Mrs. Brunner

I. Discovering Cells A. cell - B. First Sightings C. Cell Theory 1. when? 2. how? 3. Robert Hooke http://www.zeiss.de/C12567A100537AB9/Contents-Frame/7C0A8411B79C438BC12569360031B446 a. when? b. observed cork using… c. ‘cell’… 4. Anton van Leeuwenhoek b. observed pond water 1. animalcules 2. scrapings from… c. How is his work different from Hooke? C. Cell Theory 1. Matthais Schleiden – 2. Theodor Schwann

D. How a Light Microscope works 3. Rudolf Virchow – 4. theory states a. all living things b. cells are the basic unit of c. all cells are produced D. How a Light Microscope works 1. Magnification – 2. Lens magnifies objects because… 3. Convex lens a. what is it? b. why does it work? 4. total magnification a. 2 lenses b. formula to determine… 5. Resolution - E. Electron Microscope 1. uses a beam of… 2. allows better… http://www5.pbrc.hawaii.edu/microangela/

F. Why was the “Cell Theory” such a big deal? II. Looking Inside Cells A. Organelles – tiny structures that… B. Cell Wall – rigid outer layer of plant cell 1. made of cellulose 2. tough but flexible 3. function – 4. only in C. Cell Membrane – 1. in plant cell…in animal cell… 2. selective permeability 3. function -

D. Nucleus – brain, controls all 1. nuclear membrane 2. chromatin 3. nucleolus E. Cytoplasm – gel-like substance 1. constantly moving 2. makes up … F. Mitochondria – powerhouse of cell 1. rod shaped 2. function G. Endoplasmic Reticulum 1. maze of passageways 2. function

H. Ribosome – small grain-like bodies 1. location 2. function I. Golgi Bodies 1. flattened group of sacs and tubes J. Chloroplast 1. only in 2. green 3. function K. Vacuole – large, water filled sac 1. in both animal and plant cells L. Lysosome 1. small round organelles that contain enzymes to…

Can you tell the difference between a plant and animal cell? Do you know what the function of each structure is? Can you label a diagram?