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Cell s&f

structure and function

QuestionAnswer
Cell definition The smallest unit of matter that can carry on all processes of life
cell discover time early 1600's (17th century) by the development of the microscope
Hooke Dead Cells 1665 he used a microscope to look at a thin slice of cork "little boxes" found similar structures in other plants reminded of monks, hence the name cell
Van Leeuwenhoek dutch microscope maker first to see LIVING cells
Shleiden 1838 all plants made of cells
Schwann 1839 all animals made of cells
Virchow 1855 proposed that all cells come from preexisting cells. finishing cell theory
cell theory living?dead?one?more? All living cells are composed of one or more cells
cell theory basic?complex? cells are the basic units of structure and function in an organism
cell theory reproduction? cells come only from the reproduction of existing cells
cell diversity basic not all cells are alike even cells within the same organism may show diversity in: SIZE SHAPE AND OR INTERNAL ORGANIZATIONS
SIZE most cells are only visible with a microscope same cells can be seen with the naked eye (Frog egg cells) cells are limited by the ratio between their outer surface and their volume
cells prefer a LARGE SURFACE AREA to a SMALL VOLUME
SHAPE diversity of the FORM shows the diversity of the FUNCTION long extensions (NERVE CELLS)allow cells to SEND and TRANSMITSIGNALS FLA SHAPE (Skin cells)suited for covering the body CHANGESHAPE (white blood cells)leave blood and move through tiny openings
INTERNAL ORGANIZATION Cells contain a variety of internal structures called organelles they perform specific functions Organelles & parts maintain the life of the cell
TYPES OF CELLS Prokaryotes - generally SMALLER AND SIMPLER Eukaryotes - generally LARGER AND MORE COMPLEX
PROKARYOTES do NOT contain a nucleus no membrane bound organelles freefloating piece of DNA in the cytoplasm Prokaryote cells evolved before nuclei developed limited parts and membranes Bactria
EUKARYOTES cells that contain a nucleus genetics material is contained in a nucleus, separated from the rest of the cell contains MANY structures/organelles and internal membranes plants, animals, fungi
Created by: Bones1987
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