sarcomere
sarcomere
sarcomere(肌节)
sarcomere(肌节)
骨骼肌细胞收缩的基本功能单位是() A: troponin B: sarcomere C: myosin D: actin
骨骼肌细胞收缩的基本功能单位是() A: troponin B: sarcomere C: myosin D: actin
A healthy 32-year-old man lifts weights regularly as part of his work-out. In one of his biceps muscle fibers at rest, the length of the I bandis 1.0 μm and the A band is 1.5 μm. Contraction of that muscle fiberresults in a 10% shortening of the length of the sarcomere. What isthe length of the A band after the shortening produced by musclecontraction? A: 1.50 μm B: 1.35 μm C: 1.00 μm D: 1.90 μm E: 0.45 μm
A healthy 32-year-old man lifts weights regularly as part of his work-out. In one of his biceps muscle fibers at rest, the length of the I bandis 1.0 μm and the A band is 1.5 μm. Contraction of that muscle fiberresults in a 10% shortening of the length of the sarcomere. What isthe length of the A band after the shortening produced by musclecontraction? A: 1.50 μm B: 1.35 μm C: 1.00 μm D: 1.90 μm E: 0.45 μm
肌节（Sarcomere）是指 A: 相邻两Z线之间的一段肌原纤维 B: 相邻两M线之间的一段肌原纤维 C: 相邻两M线之间的一段肌丝 D: 相邻两Z线之间的一段肌丝 E: Z线与M线之间的一段肌原纤维
肌节（Sarcomere）是指 A: 相邻两Z线之间的一段肌原纤维 B: 相邻两M线之间的一段肌原纤维 C: 相邻两M线之间的一段肌丝 D: 相邻两Z线之间的一段肌丝 E: Z线与M线之间的一段肌原纤维
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