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Plant Gas Exchange
| Term | Definition |
|---|---|
| photosynthesis | conversion of light energy from the sun into chemical energy. |
| photosynthesis equation | 6CO2 + 6H2O --> light energy --> C6H12O6 + 6O2 |
| respiration | the process by which cells break down simple food molecules to release the energy they contain. |
| aerobic respiration equation | glucose + oxygen -> carbon dioxide + water |
| chloroplast | site of photosynthesis |
| autotroph | an organism that makes its own food |
| mitochondria | powerhouse of the cell |
| stomata | small openings on the underside of a leaf through which oxygen and carbon dioxide can move |
| guard cells | control the opening and closing of stomata |
| diffusion | movement of molecules from an area of higher concentration to an area of lower concentration |
| lower epidermis | contains guard cells and stomata |
| spongy mesophyll | loose tissue beneath the palisade layer of a leaf; has many air spaces between its cells |
| palisade mesophyll | layer of cells under the upper epidermis of a leaf |
| upper mesophyll | cells aligned vertically and tightly packed for maximum absorption of sunlight. Main location of photosynthesis |
| cuticle | a waxy covering on the surface of stems and leaves that acts as an adaptation to prevent desiccation in terrestrial plants. |
| xylem vessels | transports water and minerals through the plant, from roots to leaves. Also supports the plants |
| phloem tubes | long tubes made up of living cells with perforated end walls, which transport sucrose and other substances in plants |
Created by:
justineforrest
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