9
Muscles and Muscle Tissue
Overview of Muscle Tissues
(pp. 276–278)
Types of Muscle Tissue (p. 277)
Special Characteristics of Muscle Tissue
(p. 277)
Muscle Functions (pp. 277–278)
Skeletal Muscle
(pp. 278–305)
Gross Anatomy of a Skeletal Muscle
(pp. 278–279)
Microscopic Anatomy of a Skeletal Muscle
Fiber (pp. 279–285)
Sliding Filament Model of Contraction
(p. 285)
Physiology of Skeletal Muscle Fibers
(pp. 285–293)
Contraction of a Skeletal Muscle
(pp. 293–298)
Muscle Metabolism (pp. 298–301)
Force of Muscle Contraction (pp. 301–302)
Velocity and Duration of Contraction
(pp. 302–304)
Adaptations to Exercise (pp. 304–305)
Smooth Muscle
(pp. 305–311)
Microscopic Structure of Smooth Muscle
Fibers (pp. 305–307)
Contraction of Smooth Muscle
(pp. 307–309)
Types of Smooth Muscle (p. 309)
Developmental Aspects of Muscles
(pp. 312–313,
315)
276
B
ecause flexing muscles look like mice scurrying
beneath the skin,
some scientist long ago dubbed them
muscles
, from the Latin
mus
meaning “little
mouse.” Indeed, we tend to think of the rippling muscles of professional boxers or
weight liFers when we hear the word
muscle
. But muscle is also the dominant tissue in
the heart and in the walls of other hollow organs. In all its forms, muscle tissue makes up
nearly half the body’s mass.
Muscles are distinguished by their ability to transform chemical energy (ATP) into
directed mechanical energy. In so doing, they become capable of exerting force.
Overview of Muscle Tissues
Compare and contrast the three basic types of muscle tissue.
List four important functions of muscle tissue.
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