Chapter_9_Checklist_RTF

Chapter_9_Checklist_RTF - Muscle Checklist 1. Describe the...

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Muscle Checklist 1. Describe the organization of muscle at the tissue level. Epimysium- the dense irregular connective tissue that surrounds each muscle and is directly fused to the periosteum of a bone. Perimysium- fibrous connective tissue that surrounds group of muscle fibers called fascicles. Endomysium- sheath of connective tissue composed of reticular fibers that surrounds each muscle fiber Fascicle- group of muscle fibers Muscle fiber- the basic structure of a muscle (cell) Blood vessel- supplies blood and oxygen to muscles 2. Identify the structural components of a sarcomere . Thin Myofilament- extend across the I band and partway into the A band. Composed of the protein actin. Each actin molecule is a helical polymer of globular subunits called G actin, which contain the active sites to which myosin heads attach during contraction. Tropomyosin and troponin are regulatory subunits bound to actin. Thick Myofilament- extend the entire length of an A band. Composed of the protein myosin. Each myosin molecule has a rod-like tail and two globular heads: Tail- two interwoven, heavy polypeptide chains Heads- two smaller polypeptide chains called cross bridges 3. Identify the components of the neuromuscular junction, and summarize the events involved in the neural control of skeletal muscles. Axonal endings, which have small membranous sacs, know as synaptic vesicles that contain acetylcholine (Ach), a neurotransmitter. The motor end plate of a muscle- a specific part of the sarcolemma that
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This note was uploaded on 04/02/2008 for the course BIO 201 taught by Professor Oberstein during the Spring '08 term at ASU.

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Chapter_9_Checklist_RTF - Muscle Checklist 1. Describe the...

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