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bio 4/4
| Question | Answer |
|---|---|
| vacuoles | store materials like water, salts, proteins and carbs |
| lysosomes | break down stuff and filled with enzymes |
| diffusion | particles move from an area of high concentration to an area of lower concentration |
| facilitated diffusion | process when molecules that cannot directly diffuse across the membrane pass through special protein channels |
| isotonic | same strength |
| hypertonic | above strength |
| hypotonic | below strength |
| osmotic pressure | the net movement of water out of or into a cell produces this force |
| active transport | the movement of materials against a concentration difference |
| endocytosis | the process of taking material into the cell by means of infoldings/pockets of the cell membrance |
| exocytosis | cells release large amounts of material |
| cell membrane | thin flexible layer cells are surrounded by |
| cytoplasm | portion outside nucleus |
| vacuoles | store materials like water, salts, proteins and carbs |
| lysosomes | break down things |
| cytoskeleton | helps cell maintain shape and is involved in movement |
| centrioles | help organize cell division |
| ribosomes | proteins assembled here |
| ER | internal membrane system in eukaryotic cells |
| golgi apparatus | modifies, sorts, and packages proteins and other materials from the ER for storage in the cell or release outside the cell |
| chloroplasts | capture energy from sunlight and convert it into food that contains chemical energy during photosynthesis |
| mitochondria | convert the chemical energy stored in food into compounds that are more convenient for the cell to use |
| lipid bilayer | gives cell membranes a flexible structure that forms a strong barrier between the cell and its surroundings |
| selectively permeable | some substances can pass across them and others cant |