BIOLOGY Cells 2
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Name the 3 parts of the Cell Theory.
- 1. All living things are made of cells
- 2. Cells are the basic units of structure and function in living things
- 3. All cells come from preexisting cells
What does selectively permiable mean when dealing with a cell membrane?
It allows some substances to cross the membrane more eaily than others, and that some substances may be blocked all together.
What organelles are found only in animal cells?
What organelles are found only in plant cells?
- Cell Wall
What is a eukaryotic cell?
A cell that has a nucleus.
What is a prokaryotic cell?
- A cell that does not have a nucleus.
- Example: Bacteria
What is diffusion?
The process by which molecules of a substance move from areas of higher concentration of that substance to areas of lower concentration.
What is osmosis?
The diffusion of water molecules through a selectively permiable membrane.
What is active transport?
An energy-requiring process that enables materials to move across a membrane against a concentration difference.
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