cell definitions

Lysosome

Cell organelle filled with enzymes needed to break down certain materials in the cell (179)

Vacuole

Cell organelle that stores materials such as water, salts, proteins, and carbohydrates ( 179)

Cytoplasm

Material inside the cell membrane - not including the nucleus. (174)

Chloropast

Organelle found in cells of plants and some other organisms that catures the energy from sunlight and converts it itnto chemical energy. (180)

Organelle

Specialized structure that performs inmportant cellular functions within a eukaryotic cell ( 174)

Golgi apparatus

Stack membranes in the cell that modifies, sorts, and packages proteins from the endoplasmic reticulum (178)

Cell wall

Strong supporting layer around the cell membrane in plants, algae, and some bacteria (187)

Mitochondrian

cell organelle that converts the chemical energy stored in food into compounds that re more convienent for the cell to use. (pg. 179)

Cell

collection of living matter enclosed by a barrier that separates the cell from its surrondings, basic uniforms of life. (16, 70)

Cell Theory

idea that all living things are composed of cells, cells are the basic unit of structure and function of livng thngs and new cells are produced from existing cells.(170)

Endoplastic reticulum

internal membrane system in cells in which lipid components of the cell membrane are assembled and some proteins are modified (177)

Nuclear Envelope

layer of two membranes that surrounds the nucleus of a cell (176)

Eukaryote

organism whose cells contain a nucleus. (173)

Ribosome

small particle in the cell on which proteins are assembled; made of RNA and protein (177)

Nucleolus

small, dense region within most nuclei in which assembly of proteins begin. ( 176)

Nucleus

the center of the atom which contains the protons and neutrons; in cells, structure that contains the cell's genetic material (DNA) and controls the cell's activities ( 35, 173)

Cell membrane

thin flexible barrier around a cell; regulates what enters and leaves cells.(182)

Prokaryote

unicellur organism lacking in a nucleus. (173, 471)