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Essay / Research Paper Abstract
A 5 page paper describing muscle function and structure. There are several theories of the action of muscle contraction. Though at least two of these theories appear to be more than plausible, the precise mechanism by which muscles contract still is not absolutely known. What is known, however, is that the entire process is biochemically controlled and tightly choreographed to produce the desired result. Bibliography lists 4 sources.
Page Count:
5 pages (~225 words per page)
File: CC6_KSmuscCont.rtf
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Unformatted sample text from the term paper:
are several theories of the action of muscle contraction. Though at least two of these theories appear to be more than plausible, the precise mechanism by which muscles contract
still is not absolutely known. What is known, however, is that the entire process is biochemically controlled and tightly choreographed to produce the desired results. Structure
Skeletal muscle consists of either striated, somatic or voluntary muscle. Nomenclature depends on "the appearance, the location, or the innervation" (Bock and Rainford, 2002).
Depending on the type of muscle fiber, individual cells (fibers) can range in length from 1 mm to over 15 cm. They may branch, but they usually do not.
These individual cells contain many nuclei, and the fibers are enclosed in the sarcolemma, a complex membrane that plays a primary role in the biochemistry of contraction.
A cross section of a bundle of muscle fiber reveals "a characteristic pattern of light and dark bands within which are narrower bands. These bands
are dependent upon the arrangement of the two sets of sliding filaments and the connections between them" (Bock and Rainford, 2002). There are also several different types of skeletal
fibers, including "twitch and tonus, red and white, fast twitch and slow twitch, large- and small-diametered, and so forth" (Bock and Rainford, 2002).
When organized into muscles, individual fibers run parallel to each other between the two points of muscle attachment. Individual fibers are grouped into "bundles," which in turn are grouped
into larger tissue sections. Bundles are enclosed in perimysium, which is a collagenous connective tissue. This and the epimysium, another connective tissue, grade "rather abruptly into the dense
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