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Biology Chapter 2

QuestionAnswer
cytology the study of cells
cell the structional unit of life
protoplasm all living substannces within a cell
cell theory all living things are organisms made up of microscopic units called cells
unicellular organism an organism that consists of only one cell
multicellular organism an organism that consists of many cells
colonial organism an organism that consists of a group
Centrioles where the spindle fibers branch off
microtubules determine the shape of the cell and form the spindles that drive mitosis and meiosis
cilia tiny hairs that usually cover the entire outside of the body
osmosis movement of water through a semipermeable membrane from greater concentration to lesser concentration
isotonic solution the concentration of solutes and water in the solution equals equals the concentration of solutes and water inside the cell
hypotonic solutions the concentration of solutes is lower and the concentration of water is higher in the solution than inside the cell
cytolysis the bursting of a cell due to internal water pressure
hypertonic solution the concentration of solutes is higher and the concentration of water is lower in the solution than inside the cell
plasmolysis the collapse or shriveling up of a cell due to loss of water
passive transport movement of molecules with the concentration gradient
facilitated diffusion movement occurs with the concentration gradient
active transport movement across the membrane against the concentration gradient
endocytosis transport of substances into the cell across the plasma membrane
exocytosis process in which vesicles fuse with the plasma membrane to release substances from the cell
Created by: tomlinson5606
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