Anatomy & Physiology Chapter 9 Part A Lecture : Muscles and Muscle Tissue

Anatomy & Physiology Chapter 9 Part A: Muscles and Muscle Tissue Lecture Please leave questions in the comments below or email directly at [email protected] Chapter 9 Part B can be found here: https://youtu.be/2U3DsK7BHVU Text: Elaine Marieb & Katja Hoehn Human Anatomy and Physiology 10th edition. Pearson Education Inc 2016. The Human Body: An Orientation. Topics covered: Overview of Muscle Tissue Types of Muscle Tissue Characteristics of Muscle Tissue Muscle Functions Skeletal Muscle Cardiac Muscle Smooth Muscle Muscle Fibers Voluntary muscles Involuntary Muscles striated muscle non striated muscle excitability contractility extensibility elasticity skeletal muscle anatomy connective tissue sheath Epimysium Perimysium Endomysium Insertion Origin Direct muscle attachment Fleshy muscle attachment indirect Muscle attachment tendon aponeurosis fascicle sarcolemma Sarcoplasm glycosomes myoglobin myofibrils sarcoplasmic reticulum SR Transverse Tubules T Tubules myofibrils striations sarcomeres myofilaments molecular composition of myofilaments A Band H Zone M line I band Z Disc Z Line Sarcomere Actin myofilaments Myosin myofilaments Thin filaments Thick Filaments Myosin cross bridges G actin tropomyosin troponin elastic filament titin filaments Dystrophin Nebulin Myomesin C proteins Terminal cistern Triad sliding filament model of contraction Action Potential neuromuscular junction excitation-contraction coupling The Nerve Stimulus and Events at the Neuromuscular Junction somatic motor neuron neuromuscular junction motor end plate axon terminal synaptic cleft synaptic vesicles acetycholine Ach junctional folds Ach receptors axon terminals acetylcholinesterase myasthenia gravis end plate potential depolarization repolarization refractory period excitation-contraction coupling E-C coupling ligand gated channel voltage sensitive tubule protein voltage gated ion channels Four steps of the cross bridge cycle Cross bridge formation Power Stroke Working Stroke Cross Bridge Detachment Cocking of Myosin head Rigor Mortis