Cell discovery and Organelles
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| Robert Hooke | 1st to describe cells; Looked at cork cells; 1665
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| Anton van Leeuwenhoek | 1673; looked at yeast, animal blood, pond scum, and bacteria
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| 3 parts of cell theory | 1) All organisms are made from one or more cells 2) The cell is the basic unit of life 3) All cells come from cells
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| Surface area-to-volume ratio | Limits the size of cells because they have to be able to get nutrients in and waste products out
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| 2 things cells must do to survive | 1) Take in nutrients 2) Get rid of wastes
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| organelles | structures inside the cells that perform their specific functions to keep the cell productive
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| prokaryote | a single-celled organism which does not have a nucleus in its cell; bacteria is an example
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| eukaryote | a multi-celled organism which has nuclei in its cells; plants and animals are examples (including humans)
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| DNA | unique genetic information which is read by the ribosomes and stored in the nucleus of the cell; the instructions of the cell
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| Do you know the organelles and their jobs? | yes
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| 3 advantages of being multicellular | 1) larger size (fewer predators) 2) longer life (life goes on when a cell dies) 3) cells can specialize (more complex organisms)
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| cells | the basic unit of life; the simplest level of organization
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| tissue | cells work together to perform a certain funtion
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| organ | tissues work together to perform a certain function
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| organ systems | organs work together to perform a certain function
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| structure | the shape, form, or arrangement of the parts of an organism
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| function | the job of a part of an organism
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| levels of organization of living things | cells --> tissues --> organs --> organ systems (--> organism......if it is multicellular)
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| surface area | area outside the cell covered by cell membrane; good for letting materials in and out
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| volume | area inside the cell; not good if too big because more nutrients are needed and more waste must get out
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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.
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To hide a column, click on the column name.
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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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