Cell Organelles
This organelle is know as the control center of the cell and holds the DNA
nucleus
The general term for the movement of molecules across a cell membrane without using cellular energy.
passive transport
The general term for transport that requires the cell to use energy, usually in the form of ATP.
active transport
The process a cell uses to release large molecules, like hormones, to the outside.
exocytosis
This scientist was the first to see cells under a microscope and called them “tiny rooms.”
Robert Hooke
These small structures create proteins for the cell
ribosomes
The movement of molecules from an area of high concentration to an area of low concentration
diffusion
This process uses energy to move materials out of a cell by packaging them in a vesicle that fuses with the cell membrane.
exocytosis
The protective barrier of a cell that controls what enters and leaves.
cell membrane
Cell theory states that all living things are made of these.
cells
This organelle packages and ships proteins and other materials inside and outside the cell
golgi apparatus
The diffusion of water molecules across a selectively permeable membrane.
osmosis
This process uses energy to bring materials into a cell by forming a vesicle around them.
endocytosis
A property of cell membranes that allows some substances to pass through, while others cannot.
semipermeable
According to cell theory, cells come from this.
pre-existing cells
This organelle provides energy to the cell
mitochondria
A type of passive transport where molecules like glucose use special protein channels to cross the cell membrane.
facilitated diffusion
Active transport moves substances from an area of low concentration to an area of this concentration.
high concentration
The small, membrane-bound sac used to transport substances during endocytosis and exocytosis.
vesicle
This part of cell theory says that the cell is the basic unit of structure and function in living things.
The cell is the basic unit of life.
This organelle helps break down waste and worn out cell parts using enzymes
lysosome
This state is reached when the concentration of a substance is the same on both sides of a membrane, and molecules move across at equal rates.
equilibrium
Nerve cells use this type of transport to pump sodium and potassium ions across the membrane to create a nerve impulse.
active transport
The molecule that provides the energy for active transport.
ATP
This scientist helped develop the idea that all plants are made of cells.
Schleiden