| A | B |
|---|
| Cell membrane | Controls the movement of substances into and out of the cell |
| Cytoplasm | Surrounded by the cell membrane, contains enzymes |
| Enzymes | Catalysts found in the cytoplasm |
| Protein | What enzymes are made of |
| Nucleus | Contains chromosomes |
| Mitochondria | The parts of the cell where most of the reactions of respiration take place |
| Aerobic respiration | Mitochondria carry out this process which requires oxygen |
| Cellulose | Molecule which makes up the cell wall |
| Cell wall | Structure found in plant cells, made of cellulose |
| Chloroplasts | Contain chlorophyll |
| Chlorophyll | Green pigment needed for photosynthesis |
| Vacuole | A large, permanent sac full of cell sap |
| Sensitivity | The life process which involves nerves |
| Tissue | Many cells of the same type |
| System | A group of organs working together |
| Organ | A structure made up of several different tissues which performs a special function |
| Animals | Organisms whose cells don't have a cell wall |
| Plants | Organisms whose cells have cell walls, a large vacuole and often have chloroplasts |
| Underground | Where would you find parts of a plant with no chloroplasts |
| Passive | Word used to describe diffusion and osmosis, where molecules move without needing an input of energy |
| Concentration gradient | What molecules move down during diffusion |
| Random | Movement of individual particles during diffusion |
| Membranes | Small molecules can diffuse through them, big ones cannot |
| Partially permeable | Describes a membrane which lets small molecules diffuse through it but not large ones |
| Osmosis | The diffusion of water |
| Increases | This happens to the mass of potato chips when they are put in distilled water |
| Decreases | This happens to the mass of potato chips when they are put in a concentrated sugar solution |
| Turgid | A cell with a high pressure of water in it |
| Wilt | Happens to plants when their cells lose too much water |
| Support | Important job in a plant carried out by turgid cells |
| Active transport | Transport of molecules up their concentration gradient. It uses energy. |
| Energy | Needed for active transport |
| Mitochondria | You would find lots of these in a cell which had to use lots of energy |
| Flaccid | Word describing a cell which has lost so much water it has gone floppy |
| Carbon dioxide | A small molecule which can diffuse easily out of respiring cells |
| Oxygen | A small molecule which can diffuse easily into respiring cells |
| Visking tubing | A manmade, partially permeable membrane |
| Respiration | Process which supplies the energy for active transport |
