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Ch. 3 Bio

Chapter 3 biology terms

TermDefinition
cell theory states that all organisms are made of cells
cytoplasm a jelly like substance that contains dissolved molecular building blocks
organelle structures specialized to preform distinct processes within a cell
prokaryotic cell a cell that doesn't have a nucleus or other membrane bound organelles
eukaryotic cell have a nucleus and other membrane bound organelles
cytoskeleton a flexible network of protiens that provide structura
nucleus Organelle that acts as the storehouse for most of a cells DNA
endoplasmic reticulum interconnected network of thin folded membranes that produce process and distribute proteins
ribosome organelle that links amino acids together to form proteins
Golgi apparatus stack of flat membrane enclosed spaces containing enzymes that handle proteins
vesicle small organelle that contains and transports materials within the cytoplasm
mitochondiron bean shaped organelle that supplies energy to the cell and has its own ribosomes and DNA
vacuole organelle that is used to store materials such as water, food, or enzymes that are needed by the cell
lysosome organelle that contains enzymes
centriole small organelle that aids mitosis
cell wall rigid structure that gives protection, shape and support to plants, algae, fungi and bacteria
chloroplast organelle composed of numerous membranes that are used to convert solar energy into chemical energy
cell membrane a boundary between the cell and the surrounding environment
phospholipid molecule that forms a double-layered cell membrane
fluid mosaic model model that describes the arrangement and movement of the molecules that make up a cell membrane
selective permeability condition or equality of allowing some, but not all, materials to cross a barrier or membrane
receptor protein that detects a signal molecule and preforms an action in response
passive transport movement of molecules across the cell membrane without energy input from the cell
diffusion movement of dissolved molecules in a fluid or gas from of a region of higher concentration to a region of lower concentration
concentration gradient difference in the concentration of a substance from open location to another
osmosis diffusion of water molecules across a semipermeable membrane from an area of higher water concentration to an area of lower concentration
isotonic solution that has an equal concentration of dissolved particles compared with another solution
hypertonic solution that has a higher concentration of dissolved particles compared with another solution
hypotonic solution that has a lower concentration of dissolved particles compared with another solution
facilitated diffusion diffusion of molecules assisted by protein channels that pierce a cell membrane
active transport movement of molecules across a membrane from a region of lower concentration to a region of higher concentration
endocytosis uptake of liquids or large molecules into a cell by inward folding of the cell membrane
phagocytosis uptake of a solid particle into a cell by engulfing the particle
exocytosis release of substances out of a cell
Created by: MolinaO21