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Anatomy Lecture 7
| Definition | Term |
|---|---|
| Functions of Muscle (List all 5) | 1. Movement 2. Stability 3. Control of Body Openings/Passages 4. Heat Production (Thermogenesis) 5. Glycemic Control |
| Universal Characteristics of Muscle (List all 5) | 1. Excitability 2. Conductivity 3. Contractility 4. Extensibility 5. Elasticity |
| a sheet of connective tissue that separates neighboring muscles or muscle groups into compartments | superficial fascia |
| a fibrous sheath that surrounds an entire muscle | epimysium |
| a thicker connective tissue sheath that wraps muscle fibers together into fascicles | perimysium |
| a thin sleeve of loose connective tissue that surrounds each muscle fiber; it provides the extracellular chemical environment for the muscle fiber and its associated nerve ending | endomysium |
| relatively long muscles that are thick in the middle and tapered at the end; their strength is proportional to the diameter of the muscle at its thickest point | fusiform |
| have a fairly uniform width and parallel fascicles; they can span long distances | parallel |
| fan shaped muscles that are broad at one end and narrower at the other; they are relatively strong muscles because they contain a large number of fibers in the wider part of the muscle | triangular |
| feather-shaped muscles; they have fascicles that insert obliquely on a tendon; they tend to generate more force than other types because they fit more muscle fibers into a given length of muscle | pennate |
| form rings around certain body openings; when they contract, they constrict the opening and tend to prevent the passage of material through it | circular (sphincters) |
| a type of tendon that takes the form of a broad sheet | aponeurosis (fascia) |
| a band of connective tissue from which tendons pass under and also serves as proprioception for the limbs | retinaculum |
| any muscle contained entirely within a region of interest | intrinsic |
| a muscle that acts upon a designated organ or region but arises from another region | extrinsic |
| the effect produced by a muscle, whether to produce or prevent a movement | action |
| the muscle that produces most of the force during a particular joint action | prime mover (agonist) |
| a muscle that aids the prime mover; it may stabilize a joint, restrict certain movements, or modify the direction of a movement so that the action of the prime mover is more coordinated and specific | synergist |
| a muscle that opposes the prime mover | antagonist |
| a muscle that prevents a bone from moving so that other groups of muscles can perform its actions | fixator |
Created by:
ryan707
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