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Cells

Biology

TermDefinition
Cell theory cell theory is a scientific theory which describes the properties of cells
cytoplasm the material or protoplasm within a living cell, excluding the nucleus
organelle any of a number of organized or specialized structures within a living cell.
prokaryotic cell y of the typically unicellular microorganisms that lack a distinct nucleus and membrane-bound organelles and that are classified as a kingdom
eukaryotic cell An organism whose cells contain a nucleus surrounded by a membrane and whose DNA is bound together by proteins (histones) into chromosomes.
nucleus in physical science, an atom's central region, which is made up of protons and neutrons
endoplasmic reticulum a system of membranes that is found in a cell's cytoplasm and that assists in the production, processing, and transport of proteins and in the production of lipid
ribosome a cell organelle composed of RNA and protein; the site of protein synthesis
golgi apparatus a complex of vesicles and folded membranes within the cytoplasm of most eukaryotic cells, involved in secretion and intracellular transport
vesicle a small cavity or sac that contains materials in a eukaryotic cell; forms when part of the cell membrane surrounds the materials to be taken into the cell or transported within the cell
mitochondrion in eukaryotic cells, the cell organelle that is surrounded by two membranes and that is the site of cellular respiration, which produces ATP
vacuole a fluid-filled vesicle found in the cytoplasm of plant cells or protozoans
lysosome a cell organelle that contains digestive enzymes
centriole an organelle that is active during mitosis
cell wall a rigid structure that surrounds the cell membrane and provides support to the cel
chloroplast an organelle found in plant and algae cells where photosynthesis occurs
cell membrane a phospholipid layer that covers a cell’s surface and acts as a barrier between the inside of a cell and the cell’s environment
phospholipid a lipid that contains phosphorus and that is a structural component in cell membranes
fluid mosaic model
selective permeability
recepter a specialized sensory nerve that responds to specific types of stimuli
passive transport the movement of substances across a cell membrane without the use of energy by the cel
diffusion the movement of particles from regions of higher density to regions of lower density
concentration gradient a difference in the concentration of a substance across a distance
osmosis the diffusion of water or another solvent from a more dilute solution (of a solute) to a more concentrated solution (of the solute) through a membrane that is permeable to the solvent
isotonic
hypertonic
hypotonic
facilitated diffusion
active transport
endocytosis
phagocytosis
exocytosis
Created by: bigpappi
 

 



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