10 Study Guid

10 Study Guid - 10: The Muscular System (Study Guid)...

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10: The Muscular System (Study Guid) (Shreya Buch) Interactions of Skeletal Muscles in the Body 1. Explain the way muscles work in the body. 2. Describe prime movers, antagonists, synergists, and fixators. Naming Skeletal Muscles 3. Identify the criteria used to name skeletal muscles. Muscle Mechanics: Importance of Fascicle Arrangements and Leverage 4. Indicate the most common patterns of fascicle arrangement found in skeletal muscles. 5. Define a lever, fulcrum, and effort. 6. List the three types of lever systems and give examples of each in the body. Major Skeletal Muscles of the Body 7. Name and identify the muscles described in Tables 10.1 to 10.17. State the action, origin, and insertion of each. I. Interactions of Skeletal Muscles in the Body (p. 325) A. Muscles only pull; they are not capable of pushing. B. The muscle that provides the major force for the specific movement is called the prime mover or the agonist. C. Muscles that oppose or reverse a particular movement are called the antagonists. D. Synergists help the prime movers by adding extra force to the same movement, or by reducing undesirable or unnecessary movements. II. Naming Skeletal Muscles (pp. 325-326) A. Some muscle names indicate the bone or body region with which the muscle is associated. B. Some muscles are named for their shape. C. Terms such as maximus, minimus, longus, and brevis are often used in muscle names to indicate relative size of the muscle. D. The names of some muscles indicate the direction in which their fibers run in relation to an imaginary line of the body, such as the midline. E. The number of origins a muscle has may be indicated by the word biceps, triceps, or quadriceps in its name. F. Some muscles are named according to the location of their origin and insertion. G. A muscle may be named for its action by using a word such as flexor or extensor in its name. III. Muscle Mechanics: Importance of Fascicle Arrangement and Leverage (pp. 326-330; Figs. 10.1- 10.3) A. In skeletal muscles the common arrangement of the fascicles varies, resulting in muscles with different shapes and functional capabilities. (p. 326; Fig. 10.1) 1. The fascicular pattern is circular when the fascicles are arranged in concentric rings. 2. A convergent muscle has a broad origin and its fascicles converge toward a single tendon of insertion. 3. In a parallel arrangement, the long axis of the fascicles runs parallel to the long axis of the muscle.
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This note was uploaded on 04/27/2008 for the course BIO 137 taught by Professor Webb during the Spring '08 term at KCTCS.

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10 Study Guid - 10: The Muscular System (Study Guid)...

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