Types of Muscles - muscle is also called striated muscle,...

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Types of Muscles Muscle enables complex movements  that are either voluntary—under  conscious control—such as turning the  pages of this book, or involuntary, such  as the contraction of the heart or the  peristalsis in the gut. To understand  how muscle accomplishes these  various activities, you need to know the  physiology behind a muscle  contraction. This requires a detailed  knowledge of the muscle's microscopic  anatomy. Of course, muscle  contractions will not take place without  adequate nervous stimulation or a 
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sufficient supply of ATP, the muscles'  fuel. ATP is obtained via cellular  respiration, which is accomplished by  several different metabolic pathways. There are three types of muscles: Skeletal muscles  are attached  mainly to the skeletal bones but  some are also attached to other  structures (such as the eyes for  eye movement) and causes  movements of the body. Skeletal 
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Unformatted text preview: muscle is also called striated muscle, because of its banding pattern when viewed under a microscope (for clarification, see cardiac muscle below), or voluntary muscle (because muscle contractions can be consciously controlled). Cardiac muscle is responsible for the rhythmic contractions of the heart. Cardiac muscle is involuntaryit generates its own stimuli to initiate a muscle contraction. While cardiac muscle also consists of striations, the main characteristic (to differentiate these striations from skeletal muscle) is the presence of intercalated disks. Smooth muscle lines the walls of hollow organs. For example, it lines the walls of blood vessels and of the digestive tract, where it serves to advance the movement of substances. A smooth muscle contraction is relatively slow and involuntary....
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This note was uploaded on 12/04/2011 for the course ANTHRO 2000 taught by Professor Monicaoyola during the Fall '10 term at Broward College.

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Types of Muscles - muscle is also called striated muscle,...

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