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Science: cells
science
17
Science
7th Grade
01/06/2015

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Term
cell wall
Definition
rigid layer that surrounds the cells of plants and other organisms
Term
cell membrane
Definition
controls which substances pass into and out of a cell
Term
chromatin
Definition
the material of which the chromosomes of organisms other than bacteria are composed. It consists of protein, RNA, and DNA
Term
nucleus
Definition
acts as cells control center, directing activities.
Term
nucleolus
Definition
Structers in the nucleus that controls the ribisosmes
Term
Mitochondria
Definition
converts anergy stored in food to energies the cell. Use to live and function.
Term
golgi apparatus
Definition
receives proteins and other newly formed materials from the ER, packs them, distributes them to other parts of the cell or to the outside of the cell.
Term
Endoplasmic reticulum (ER)
Definition
called ER is an organelle with a network of membranes that produces many substances
Term
choroplast
Definition
captures energy from the sunlight, changes it to a form of energy cells of plants and other organisms.
Term
vacuole
Definition
a sac that sores food, water, or other materials needed by the cell.
Term
lipid
Definition
compounds made of carbon hydrogen and oxygen
Term
carbohydrates
Definition
energy- rich organic compounds made of carbon, hydrogen and oxygen
Term
Proteins
Definition
large molecules made of carbon hydrogen oxygen nitrogen and sulfur
Term
Nucleic Acid
Definition
long organic molecules, have carbon, oxygen, hydrogen, nitrogen, and phosphorus
Term
Osmosis
Definition
diffusion of water molecules across a selectively permeable membrane.
Term
Diffusion
Definition
process which molecules mover from and area of higher
Term
Active Transport
Definition
movement of materials across a cell membrane using cellular energy
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