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Key Vocabulary

Lesson 2: Cells

Active Transport – Movement of materials into or out of a cell that requires
the use of energy

ATP – Molecule used for energy in cells

Cell – The smallest objects that can do all the things needed for life

Cell Division – Process in which one cell becomes two cells

Cell Membrane – Structure on the edge of a cell that determines what does
or doesn’t go into a cell

Cell Wall – Organelle found in plant cells that provides support and
protection

Cellular Respiration – Process in which chemical energy stored in glucose is
changed to chemical energy stored in ATP

Chloroplast – Organelle found in plant cells that allows sunlight to be used to
make food
Concentration – The amount of a substance in a certain area

Cytoplasm – Material inside the cell membrane

Daughter Cells – The cells at the end of cell division

DNA – Genetic material that has all the information about a cell

Endoplasmic Reticulum – Organelle that transports lipids and proteins
around the cell

Energy – The ability to cause a change

Eukaryote – A cell with a nucleus
Golgi Apparatus – Organelle that receives proteins and prepares them to be

sent to other places in the cell or the body
Lipid – Fat molecule

Mitochondrion – Organelle that makes energy available for the cell

Nuclear Membrane – Structure that surrounds and protects the nucleus

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