A. TYPES OF MUSCLE
Although bones and joints provide leverage and the framework for the body, they cannot move the body.
What causes motion?
Motion results from the alternating contraction (shortening) and relaxation of muscles.
The prime function of muscle is to convert chemical energy (ATP) into mechanical energy that can be used to …?
Generate force, perform work, and produce movements
Name and briefly describe the three types of muscle tissue?
Skeletal muscle -- Skeletal muscle is striated muscle and is voluntary (it
can be controlled consciously). It can only be stimulated by the nervous system.
Cardiac muscle -- Cardiac muscle is striated muscle. It is involuntary (no
conscious control). It can be stimulated or inhibited by either the nervous or the endocrine systems.
Smooth muscle -- Smooth muscle is nonstriated and also involuntary. It
also can be stimulated or inhibited by either the nervous or endocrine function.
B. FUNCTIONS OF MUSCLE
Identify and briefly describe the three functions of muscle tissue.
Motion -- Motion can be obvious body movements or less noticeable
motions such as heartbeat and gut movement.
Stabilize body positions and regulate organ volume -- Sustained
contractions of skeletal muscle maintain body posture without creating noticeable movement. Sustained contractions of smooth muscle prevent outflow from hollow organs and maintain them at an appropriate volume.
Thermogenesis -- A by-product of muscle contraction is heat production
and is therefore important in homeostasis of body temperature.
C. CHARACTERISTICS OF MUSCLE
List and define the four basic characteristics of muscle tissue.
Excitability -- Also known as irritability. This is the...