KHSS 375 Chapter Notes - Chapter 1, 3, 14: Endoplasmic Reticulum, Skeletal Muscle, Myocyte
14 Feb 2020
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Hped 375 chapters 1, 3, and 14 study guide. Know the types of connective tissue within a skeletal muscle (epi peri endo: epimysium covering (outside layer, perimysium surrounds group of muscle fibers (middle layer, endomysium surrounds individual fibers (inside layer) Be able to identify the various components of a muscle (p 5) in order (see picture below: tendon, belly, epimysium, fascicle, perimysium, endomysium, sarcomere sarcolemma and sarcoplasm, nucleus, mitochondria, myofibril, myofilaments (actin and myosin) Know the general role of the various components mentioned above contraction and expansion / relaxation. Know the role of the sarcoplasmic reticulum and component parts (t-tubules & terminal cisternae: sarcoplasmic reticulum where calcium ions are stored. Know the definition and components of motor unit (motor neuron-dendrites-axon-myelin sheath- nodes of ranvier, neuromuscular junction, efferent /afferent neurons) Phases : resting, excitation-contraction coupling (calcium binds with troponin thus causing a shift of tropomyosin), contraction (hydrolysis of atp to adp catalyzed by atpase), recharge / release, relaxation.
