| A | B |
|---|
| membrane | phospholipid bilayer surrounding the cell |
| cell wall | only in plants, contains cellulose, provides structure and support |
| ribosomes | site of protein synthesis |
| mitochondria | cellular respiration, makes energy (ATP) from sugar |
| endoplasmic reticulum | transports nutrients through the cell |
| nucleus | contains DNA, controls cellular activities |
| lysosomes | contains digestive enzymes, breaks down wastes |
| nucleolus | in the nucleus, makes ribosomes |
| chloroplasts | in plants only, site of photosynthesis, where sugar is made |
| vacuole | storage sacs, holds waste in animals, water in plants |
| golgi | membranes that package and transport proteins out of the cell |
| diffusion | movement of moecules from high to low concentration |
| osmosis | movemont of water molecules usually with salt |
| active transport | movement of molecules from low to high |
| transport proteins | move molecules into the cell using ATP |
| fluid mosaic model | picture of the plasma membrane as proteins floating in an oily sea |
| eukaryotes | cells with define organelles like nucleus, mitochondria etc |
| prokaryotes | small, primitive cells lacking defined organelle |
| cytoplasm | fluid inside the cell that transports dissolved materials like oxygen |
| selectively permeable | describes the membrane that allows only certain substances into the cell |
