Moving Cellular Material
Movement of substances through a cell membrane without using the cell's energy.
Passive Transport
A stiff structure outside of the cell membrane. It protects a cell from harmful organisms.
cell wall
Macromolecules that form when long chains of molecules called nucleotides join together. These also contain genetic information.
Nucleic Acids
The movement of substances from an area of high concentration to low concentration.
Diffusion
Part of the cell that directs all its activities.
Nucleus
Cells are the ____________ ________ of _________.
Long chains of amino acid molecules.
Proteins
The Diffusion of water molecules only through a cell membrane.
Osmosis
What does the mitochondria do?
Gives the cell energy
Substances that form by joining many small molecules together.
macromolecules
A large macromolecule that does not dissolve in water. Cholesterol is an example of one of these macromolecules.
Lipids
When molecules pass through a cell membrane using special proteins called carrier or channel proteins.
Facilitated Diffusion
A flexible covering that protects the inside of a cell from the environment outside of a cell.
Cell membrane
One, two or a long chain of sugar molecules. These store energy.
Carbohydrates
The movement of substances through a cell membrane using the cell's energy.
Active transport
The main ingredient of cells.
water
Who was the first scientist to give a cell its name?
Robert Hooke