Skeletal Muscle Actions page 317

1. Origin and insertion a. The movable end of attachment of a skeletal muscle to a bone is its insertion, and the immovable end is its origin.

b. Some muscles have more than one origin or insertion.

2. Interaction of skeletal muscles a. Skeletal muscles function in groups.

b. A prime mover is responsible for most of a movement; synergists aid prime movers; antagonists can resist the movement of a prime mover.

c. Smooth movements depend upon antagonists giving way to the actions of prime movers.

Essentials of Human Physiology

Essentials of Human Physiology

This ebook provides an introductory explanation of the workings of the human body, with an effort to draw connections between the body systems and explain their interdependencies. A framework for the book is homeostasis and how the body maintains balance within each system. This is intended as a first introduction to physiology for a college-level course.

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