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14 Cards in this Set
- Front
- Back
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What is a Cell? |
The cell is the basic structure and function in all living things.
Just like this school is made of bricks, all living things are made of cells!
This idea is called the cell theory. |
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What is a theory? |
A theory is an idea supported by evidence |
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What is a fact? |
A fact is something that is true |
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Microscopic |
Cells are microscopic.
They can only be seen under a microscope.
They can’t be seen by the eye alone. |
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When were cells discovered? |
It was not until the 1600’s that cells were discovered.
Robert Hooke was the first to observe cells. |
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What are the two kinds of cells that have different structures? |
1. Prokaryotic
2. Eukaryotic |
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Prokaryotic cells |
Prokaryotic cells:
Have no nucleus or organelles.
Unicellular life is prokaryotic.
Example: amoeba, bacterias like samonella |
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Eukaryotic cells |
Eukaryotic cells:
Have a nucleus and organelles.
Body cells of organisms are eukaryotic.
Example: skin cells, cheek cells, and muscle cells |
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Organelles |
Organelles carry out the life functions of cells |
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Plasma membrane |
Plasma membrane:
The outside of an animal cell.
It is selectively permeable.
This means it only allows certain materials to pass into and out of the cell. |
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Diffusion |
Diffusion:
the movement of molecules from a HIGH concentration to a LOW concentration (spreading out) |
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Osmosis |
Osmosis:
the diffusion of water. The movement of water from a HIGH concentration to a LOW concentration |
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Cytoplasm |
Cytoplasm:
Fluid inside the cell, made up of a network called the cytoskeleton which holds the organelles in place. Allows for the transportation of materials |
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Nucleus |
Nucleus:
The Control Center of the cell. It contains most of the cell’s DNA or genetic material. It contains the information needed for protein synthesis (making protein) |
