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Membrane & transport
Nat5 Unit 1 Section 2 DHS
| Question | Answer |
|---|---|
| In the cell membrane; these molecules are formed into a double layer. | Phospholipids |
| In the cell membrane; these molecules are involved in the transport of substances across the membrane. | Proteins |
| This term describes the ability of the cell membrane to control what passes across it. | Selectively permeable |
| This type of transport describes the movement of substances from an area of high concentration to an area of lower concentration. | Diffusion |
| This term is used to describe the difference in the concentration of a substance on the inside of a cell and the concentration of the same substance on the outside of the cell. | Concentration Gradient |
| Passive transport does not require this to occur. | Energy |
| Diffusion will stop when the concentration of a substance on either side of a cell membrane is..... | Equal |
| The term used to describe the property of molecules, such as glucose, carbon dioxide,oxygen and amino acids, that are able to move across the cell membrane. | Small/Soluble |
| This term is used to describe the movement of water molecules across a membrane by diffusion. | Osmosis |
| Osmosis is defined as the movement of water from an area of ..(1).. concentration to an area of ...(2)... concentration across a selectively permeable membrane. | (1) High (2) Lower |
| When an animal is placed in a solution which has a higher concentration to the inside of the cell, the cell will ...... | Burst |
| When an animal is placed in a solution which has a lower concentration to the inside of the cell, the cell will ...... | Shrink |
| When a plant cell is placed in a solution which has a higher concentration to the inside of the vacuole, the vacuole will ...... | Swell |
| When a plant cell is placed in a solution which has a lower concentration to the inside of the vacuole, the vacuole will ...... | shrink |
| The term used to describe a plant cell which has been placed in a solution which has a lower water concentration to the inside of the vacuole, causing the vacuole to shrink, pulling the cell contents away from the cell wall. | Plasmolysed |
| The word used to describe a plant cell, with a shrunken vacuole, that has become soft and unsupportive. | Flaccid |
| The word used to describe a plant cell, with a swollen vacuole, that has become a hard and supportive plant. | Turgid |
| This term is used to describe the movement of a substance from an area of low concentration to an area of higher concentration. | Active transport |
| This resource is required for active transport to occur. | Energy/ATP |
| These structures, found in the cell wall, are used to transport substances by active transport. | Protein pumps |
| Protects the plant cell from taking in too much water by osmosis. | Cell wall |
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