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Z331 Fall 2010 Ecampus Week 6 Lecture 1 Review Posted

Z331 Fall 2010 Ecampus Week 6 Lecture 1 Review Posted - –...

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Week 6: Lecture 1: Chapter 10 –   Muscular Tissue: Review
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fig. 10.18, 307 Marieb, 7 th   ed., fig. 9.4
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Nerve to muscle Neuromuscular  junction Sarcoplasmic  reticulum Sarcomere
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A Review of Muscle  Contraction Table 10–1 (1 of 2)
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Summary of  Excitation- contraction  coupling Tortora, 10 th  ed., fig. 10.12
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Relaxation Ach removed by  AChE Active transport of  Ca 2+  into SR Ca 2+  detaches from  troponin Active sites are  recovered by  tropomyosin Sarcomeres remain  contracted until  passive recoil of  elastic components Table 10–1, 299
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Muscle Relaxation  After contraction, a muscle fiber returns  to resting length by:
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Unformatted text preview: – elastic forces • The pull of elastic elements (tendons and ligaments) – opposing muscle contractions – Gravity can take the place of opposing muscle contraction to return a muscle to its resting state Tension Production • The all–or–none principal: – as a whole, a muscle fiber is either contracted or relaxed • Tension of a Single Muscle Fiber depends on: – the number of pivoting cross-bridges • the fiber’s resting length at the time of stimulation – the frequency of stimulation...
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  • Fall '10
  • AmyHarwell
  • muscle  contraction, Neuromuscular  junction Sarcoplasmic  reticulum Sarcomere, muscle Neuromuscular  junction

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