CHCS Life Science Chapter 4 (p50-54)
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| cell membrane | a thin covering that forms the outer boundary of a cell
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| selectively permeable | an important characteristic of membranes; certain molecules are allowed to pass through the membrane, while others are not
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| passive transport | the movement of substances through a membrane without the use of the cell's own energy; diffusion and osmosis are types of passive transport
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| 2 types of passive transport | diffusion and osmosis
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| diffusion | the movement of molecules from an area of high concentration to an area of low concentration
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| osmosis | the movement of water through a membrane from an area of high concentration to an area of low concentration
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| Anton von Leeuwnhoek | invented the compound microcope; looked at pondwater; called the moving organisms he saw "wee-beasties" or "animalcules"
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| active transport | requires the cell to use its own energy to move substances through a membrane
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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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