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Lab for Lecture DL1

by: Beatrice Deckow I

Lab for Lecture DL1 BIOL 124

Marketplace > George Mason University > Biology > BIOL 124 > Lab for Lecture DL1
Beatrice Deckow I
GPA 3.73


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This 2 page Study Guide was uploaded by Beatrice Deckow I on Monday September 28, 2015. The Study Guide belongs to BIOL 124 at George Mason University taught by Staff in Fall. Since its upload, it has received 15 views. For similar materials see /class/215110/biol-124-george-mason-university in Biology at George Mason University.


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Date Created: 09/28/15
Study guide for lab quiz on 103008 What are the characteristics of skeletal muscle tissue 0 Excitability o Contractility o Extensibility o Elasticity What are the identifying features of skeletal muscles 0 Voluntary o Striated o Multinucleated o Elongated cells Define motor unit sarcomere and synaptic cleft Motor Unit A motor neuron and all the muscle cells it stimulates Sarcomere The smallest contractile unit of muscle extends from one Z disk to the next Synaptic Cleft Fluidfilled space at the synapse What are the classifications of muscles by TYPE ie function 0 Agonist prime mover o Antagonist opposes o Synergist guiding muscle 0 Fixatorsstabilizers In what ways are skeletal muscles named o Direction of fibers 0 Relative size 0 Location 0 Number of origins 0 Origin and insertion 0 Shape 0 Action Can you identify any ofthe following muscles from a model or picture I will not ask origininsertionaction on this Masseter temporalis sternocleidomastoid pectoralis major deltoid rectus abdominus Ll39 L4 trapeziusI quot 39 quot 39 infraspinatus supraspinatus subscapularis rhomboid major 6 Identifydrawthe partscoverings of a muscle from gross anatomy down to the myofibril Draw and mm mm label a sarcomere l 5 v1 m m m um um um iiivi Wnlulimiinmm mu WWWquot mm um i Mlim Synovial Joints Characteristics of Synovial Joints The joint surfaces are enclosed by a twolayered articular capsule creating a joint cavity The inner layer is a smooth connective tissue membrane called synovial membrane which produces a lubricatingfluid Articular hyaline cartilage covers the surfaces ofthe bones formingthe joint 0 The articular capsule is typically reinforced with ligaments and may contain bursae 0 Fibrocartilage pads


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