Body Structure: Word Scramble
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| Question | Answer |
| describe the size of muscle fibres | larger than other cells and can be length of entire muscle |
| name structures of muscle fibre | sacrolemma transverse (T) tubules sacroplasmic recticulum myofibrils sacromeres |
| muscle fibre plasma membrane? | sacrolemma |
| sacrolemma? | muscle fibre plasma membrane |
| what does the sacrolemma surround? | sacroplasm |
| sacrolemma is studded with? | T tubules |
| T tubules connect what? | sacrolemma to contractile parts of cell |
| T tubules contain what? | extracellular fluid |
| T tubules are important for what? | coordinated contraction of entire cell |
| what are myofibrils made of? | contractile myofilaments of actin and myosin |
| what are myofibrils surrounded by | T tubules and sacroplasmic recticulum |
| what do myofibrils connect to | sacrolemma at both ends of muscle fibre so contraction shortens whole cell |
| where do glycogen granules and mitochondria sit? | sacroplasm adjacent to myofibrils to provide ATP for contraction |
| why do glycogen granules and mitochondria sit in the sacroplasm adjacent to myofibrils | to provide ATP for contraction |
| what sits in the sacroplasm adjacent to myofibrils to provide ATP for contraction | mitochondria and glycogen grandules |
| TC? | terminal cisternae |
| TC contain high conc of? | Ca2+ |
| why is a high conc of Ca2+ needed in TC? | for contraction |
| triad? | 2x TCs and a T tubule |
| 2x TCs and T tubule? | triad |
| sacroplasmic recticulum is important why? | Ca2+ prevented from being pumped out the cell? |
| sacromeres? | repeating unit of myofibrils |
| alternating patterns of light and dark are created by what in sacromeres? | density differences |
| alternating patters of what are creates by density differences in sacromeres? | light and dark |
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cowcow
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