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science chapter #1
cell part, diffusion and osmosis
Word | Definition |
---|---|
Cell Membrane | A membrane that separates the inside of the cell from it's surroundings. |
Cytoplasm | A gooey substance inside the cell made of organelles, water and other materials. |
Nucleus | Controls all activities in a cell and holds the DNA. |
Chloroplast | Makes chemical energy by trapping energy from the sun and changing it. |
Cell Wall | A layer of rigid, tough material that surrounds the plant cell and gives it a box like shape. |
Mitochondria | Produce energy by cellular respiration. |
Golgi Body | sorts proteins and makes them into vesicles. |
Vesicles | Function like a mail system. Carrying proteins, nutrients and water into, out of and around the cell. |
Endoplasmic Reticulum (E.R.) | A group of membrane covered channels. Can be rough or smooth. E.R.s have ribosomes all over them. |
Ribosomes | Small thing that make proteins. They float around the cell or attach to the E.R. |
Vacuoles | Compartments that sometimes store waste and are large in plant cells and small in animal cells. |
Lysosome | Contain chemicals that break down food particles, cell waste and worn out cell parts. |
Diffusion | The movement of particles from an area of higher concentration to an area of lower concentration. |
Osmosis | The diffusion of water molecules through a selectively permeable membrane, |
Concentration | The amount of a substance in a given space. |
Selectively Permeable Membrane | Allows some materials to pass through, but keeps other materials out. |
5 characteristics of living things | 1. Respond to environment 2. Need energy 3. Grow 4. Reproduce 5. Get rid of waste |
Only in plant cell | chloroplast and cell wall |