Muscular System Intro

Muscular System Intro - 1. Excitability- will respond and...

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Muscular System Assigned Readings: Chapter 9 (all of it pp. 247-283) Lecture Outline I.Overview of Muscle Tissues A. Types of Muscle Tissue 1. Skeletal muscle – long, cylindrical, multinucleate cells; obvious striations, perform voluntary movement, locomotion, manipulation of environment, associated with bones and extremities 2. Cardiac muscle – branching, striated, generally uninucleate cells, involuntarily controlled 3. Smooth muscle – spindle shaped cells with central nuclei; no striations, cells arranged to form sheets, involuntarily controlled B. Functional Characteristics of Muscle Tissue
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Unformatted text preview: 1. Excitability- will respond and conduct electrical impulses 2. Contractility can shorten their length substantially in synch 3. Extensibility can also be stretched out 4. Elasticity after stretching or contracting, it will return to its normal shape C. Muscle Functions 1. Produce movement 2. Maintaining posture keep spine and core in place 3. Stabilize joints tendons from muscles pass over joints, holding joints together, muscle tone holds things together 4. Generate heat...
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This note was uploaded on 03/24/2009 for the course BIOL 252 taught by Professor Johnson during the Spring '07 term at UNC.

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