Plant Bio (The Plant Cell)
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21 terms
Terms | Definitions |
|---|---|
 Robert Hooke | termed "cell" |
| Schleiden & Schwann | Cell Theory- cells are structural unit of life |
| Cell Size | 1/10 of a millimeter |
| Prokaryotic Cells | -bacteria -simple structure -lacks nucleus and other membrane-bound organelles -smaller |
| Eukaryotic Cells | -plants and animals -nucleus and other organelles present -larger |
| Plant Cell Wall | -cellulose -not living -water can pass thru and evaporate from it |
| Central Vacuole | -up to 90% of cell volume -fluid filled -collects waste -shrinks, turgor pressure decreases, plant wilts |
| Membranes | -living -semipermeable -tonoplast: surrounds vacuole |
| Endoplasmic Reticulum | -network of folded membranes -cellular reactions take place -rough: studded with ribosomes |
| Mitochondria | -energy is converted, so cell can use it -double membrane -site of cellular respiration |
| Chloroplast | -usually in leaves, sometimes in cortex (stem tissue) -double membrane -site of photosynthesis |
| Thylakoid | a flattened membrane sac inside the chloroplast, used to convert light energy into chemical energy |
| Granum | a stack of thylakoids in a chloroplast |
| Stroma | fluid inside chloroplast |
| Cytosol | fluid inside cell (not inside vacuole) |
| Dermal Tissue | -the epidermis -parenchyma cells |
| Ground Tissue | -the cortex and pith -parenchyma cells |
| Vascular Tissue | the xylem and phloem |
| Parenchyma Cell | -least specialized -14 sided -cellulose -no secondary wall |
| Xylem | -water and nutrients up into plant -cell type: tracheids -elongated -lignified (red color, hardening) -dead at maturity |
| Phloem | -sugars thru plant -cell type: sieve elements -no lignin |
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