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mrs. hobsons class test 7th grade

cell theory

all cells come from existing cells, all orginisms live up of one or more cells,a cell is the basic unit of living things.

cell wall

a rigid structure that surrounds the cell membrane and provides support to the cell

cell membrane

thin, flexible barrier around a cell; regulates what enters and leaves the cell


a jellylike fluid inside the cell in which the organelles are suspended


the organelles in which nutrients are converted to energy

golgi bodies

organelles that package cellular materials and transport them within the cell or out of the cell


cell organelle filled with enzymes needed to break down certain materials in the cell


makes proteins


a part of the cell containing DNA and RNA and responsible for growth and reproduction

nucleur envelope

The double membrane that seperates the nucleus from the cytoplasm

passive transport

The movement of materials through a cell membrane without using energy

active transport

the movement of materials through a cell membrane using energy


process by which molecules tend to move from an area where they are more concentrated to an area where they are less concentrated


diffusion of molecules through a semipermeable membrane from a place of higher concentration to a place of lower concentration until the concentration on both sides is equal


a process by which plants change light energy from the sun and use it to make sugar


cells that do not have a nucleus


cells that have a nucleus


cingle celled orginisms


doesnt have a nucleus but does have DNA and RNA


A protien network inside the cell that gives animal celltheir shape

endoplasmic reticulum

a cell structure that forms a maze of passageways in which proteins and other materials are carried from one part of the cell to another


organelles that capture the energy from sunlight and convert it into chemical energy in a process called photosynthesis


is green pigment in chloroplasts


small membrane-bound sac that functions in moving products into, out of, and within a cell


(biology) the basic structural and functional unit of all organisms

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