bio h 3 chapter 3 terms

Term Definition
active transport the movement of chemical substances; requires cells to use energy
cell membrane a double-layer of lipids that forms a boundary aroud a cell; controls the passage of materials in and out of cells
cell theory states that all organisms are made of cells, cells are produced by living cells, the cell is the most basic unit of life.
cell wall structure that gives protection, support, and shape to cells
centriole cylinder-shaped organelle made of protein tubes; aids mitosis
chloroplast membranes that are used to convert solar energy into chemical energy; contains chlorophyll.
concentration gradient difference in the concentration of a substance
cytoplasm jellylike substance inside cells that contains molecules and cell organelles
cytoskeleton network of proteins inside a cell that supports/shapes the cell
diffusion movement of dissolved molecules from a higher concentration to a region of lower concentration
endocytosis uptake of liquids or large molecules into a cell by folding of the membrane
endoplasmic reticulum interconnected network of thin membranes that produce, process, and distribute proteins
eukaryotic cell a cell that has a nucleus and membrane bound organelles
exocytosis release of substances by the fusion of a vesicle with the membrane
facilitated diffusion diffusion of molecules helped by protein channels that pierce a cell membrane
fluid mosaic model model that describes the arrangement/movement of molecules that make up a cell membrane
Golgi apparatus stack of flat, membrane-enclosed spaces with enzymes that process, sort, and deliver proteins
hypertonic solution that has a higher concentration of dissolved particles compared with another one
hypotonic solution that has a lower concentration of dissolved particles compared with another solution
isotonic solution that has an equal concentration of dissolvedparticles compared with another solution
lysosome organelle that contains enzymes
mitochondrion organelle that supplies energy to the cell andhas its own ribosomes and DNA
nucleus organelle made of a double membrane; acts as the storehouse for the cell’s DNA