Figure 1129

The rate of fatigue development in the three fiber types. Each vertical line is the contractile response to a brief tetanic stimulus and relaxation. The contractile responses occurring between about 9 min and 60 min are not shown on the figure.

Vander et al.: Human Physiology: The Mechanism of Body Function, Eighth Edition

Muscle CHAPTER ELEVEN

Muscle CHAPTER ELEVEN

Motor unit 1: slow-oxidative fibers

Motor unit 1: slow-oxidative fibers

-Motor unit 2: fast-oxidative fibers - Motor unit 3: fast-glycolytic fibers

TABLE 11-4 Factors Determining Muscle Tension

-Motor unit 2: fast-oxidative fibers - Motor unit 3: fast-glycolytic fibers

Time

Motor unit 1 recruited

Motor unit 2 recruited

Motor unit 3 recruited

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