| A | B |
|---|
| nucleus | the control centre of the cell |
| nucleolus | small circular structure(s) within the nucleus; may be involved in protein synthesis |
| chromosomes | genetic material found in the nucleus |
| mitochondria | where energy in the form of ATP is produced |
| ribosomes | where proteins are made |
| endoplasmic reticulum | transport system in the cell |
| golgi apparatus | packages up protein |
| lysosome | special type of vacuole that breaks down large molecules and cell parts |
| chloroplast | where photosynthesis occurs |
| cell membrane | semi-permeable; it controls what moves in and out of the cell |
| cell wall | protects and supports plant cells |
| eukaryote | cell that has a membrane-bound nucleus |
| prokaryote | a cell with no nuclear membrane and few (if any) membrane bound organelles |
| vacuole | stores wastes, water, food |
| cell theory | all cells come from other cells; only cells of one kind can produce the same cell |
| organelle | part of the individual cell with specia;lizedc function, energy, transport, etc. |
| phospholipid layer | a double layered sheet in the cell that allows water and nutrients in and out; composed of mosaic of molecules |
| cytoplasm | jelly like substance of cell that the organelles are found in |
| genetic material | Found in nucleus as DNA |
| passive transport | movement in or out of cell where little energy is used: osmosis |
| Diffusion | movement of particles from higher concentration to lower |
| concentration | the amount of substance (solute) in a solute (water) |
| facilitated diffusion | a molecule that moves through protein channels and can't move on its own through the bilayer |
| active transport | movement across the membrane using energy carried out through protein "pumps" |
| endocytosis | a type of cell transport where particles are enfolded into pockets |
| exocytosis | movement in the cell where large amounts of materials are released from the cell |
| cell specialization | individual cells with a particular purpose: nerve cell, brain cell |
| organs | groups of tissues with certain functions: stomach |
| tissues | groups of cells with specific functions: muscle |
| organ system | groups of one kind of tissue with certain function: digestive |
