cells

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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

cytoplasm

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

mitochondria

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

lysosome

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

ribosome

makes proteins

nucleus

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

diffusion

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

osmosis

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

photsynthesis

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

prokaryotic

cells that do not have a nucleus

eukaryotic

cells that have a nucleus

prokaryotes

cingle celled orginisms

bacteria

doesnt have a nucleus but does have DNA and RNA

cytoskeloten

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

chloroplasts

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

clorophill

is green pigment in chloroplasts

vesicle

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

cell

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

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