Chapter 2 Key Terms
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| cell wall | rigid structure that encloses, supports, and protects the cells of plants and most bacteria.
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| cytoplasm | gel-like mixture inside the cell in which organelles move about.
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| cell membrane | protective outer covering of all cells that regulates what enters and exits the cell.
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| nucleus | organelle that controls all the activities of a cell and contains hereditary material and DNA.
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| organelles | structures in the cytoplasm of a eukaryotic cell that perform different jobs for the cell.
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| mitochondria | cell organelle that breaks down food and releases energy.
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| endoplasmic reticulum | cytoplasmic organelle that moves materials around in a cell.
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| cytoskeleton | rigid structure inside of animal cells that helps keep their shape.
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| tissue | group of similar cells that work together to do one job.
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| prokaryotic | a type of cell that does not have organelles such as a bacteria.
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| eukaryotic | a type of cell that does have organelles such as an animal or plant cell.
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| golgi bodies | organelles that package cellular materials and transport them within the cell or out of the cell.
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| vacuoles | organelles that store materials such as water, food or waste.
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| lysosomes | organelles that recycle old cell parts and waste.
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| cell | smallest unit of an organism that can carry on life functions.
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| organ | structure, such as the heart, made up of different types of tissues that all work together.
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| organ system | group of organs that work together to do a job such as the digestive system.
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| organism | any living thing.
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| microscope | a tool used to magnify small objects such as cells.
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| electron microscope | powerful microscopes that can magnify up to 1,000,000x
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| cell theory | states that all organisms are made up of one or more cells, the cell is the basic unit of life, and all cells come from other cells.
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| vaccine | a way to prevent the spread of viruses by injecting a weakened virus into the body to build a defense against the virus.
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| common cold virus | a common virus that has no vaccine.
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| gene therapy | a way to use a virus to insert missing genetic information into a patient with a genetic disorder.
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| host cell | what a virus needs in order to make new viruses.
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| latent virus | a virus that is not active but at any time could be activated in the body such as a cold sore.
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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