AP: Muscle Contraction Flashcards
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| 7695837206 | Acetylcholine | Neurotransmitter used to send nerve impulse across neuromuscular junction between nerve and skeletal muscle | 0 | |
| 7695837207 | Actin | Thin filament; a protein filament that attaches to myosin and slides to shorten a muscle fiber |  | 1 |
| 7695837208 | Myosin | Thick filaments; a protein filament that attaches to and pulls actin to shorten a muscle; has heads that look like golf clubs |  | 2 |
| 7695837209 | Sarcomere | A contractile unit in a striated muscle cell (Z-line to Z-line) |  | 3 |
| 7695837210 | A-Band | Part of the sarcomere that contains actin and myosin overlapping |  | 4 |
| 7695837211 | Z-Disc | Marks the ends of a sarcomere. |  | 5 |
| 7695837212 | I-band | Part of the sarcomere that contains just actin, this band shortens when a muscle is contracted. (#2) |  | 6 |
| 7695837213 | H-Zone | Middle of the sarcomere that contains just myosin, this band shortens when a muscle is contracted. |  | 7 |
| 7695837214 | Cross bridges | Small bridge-like structures between myosin heads and actin filaments during muscle contraction. |  | 8 |
| 7695837215 | Neuromuscular Junction | A synapse between a motor neuron and a sarcolemma of a muscle fiber. The site where the nervous system and muscular system interact. |  | 9 |
| 7695837216 | Sarcolemma | The plasma membrane of a muscle cell that carries a nerve impulse |  | 10 |
| 7695837217 | Sarcoplasmic reticulum | The network of tubules in a muscle cell that store and transport calcium. |  | 11 |
| 7695837218 | T tubule | Transverse tube that carries nerve impulse from the sarcolemma into the cell |  | 12 |
| 7695837219 | Fiber | One entire muscle cell- runs the length of the entire muscle | 13 | |
| 7695837225 | Tropomyosin | Molecule that blocks actin's active sites (must be moved for contraction to occur) | 14 |