BIOL 2304/2101 CHAPTER 10- MUSCLE TISSUEMajor functions of muscle1.2.3.4.5.Macroscopy of Skeletal Muscleconnective tissue coverings:epimysiumperimysiumfasciclesendomysiumElizabeth Maxim & Anikó Szabó Hill 1 of 6BIOL 2304/2101 CHAPTER 10- MUSCLE TISSUEMicroscopic Anatomy of Skeletal Muscle Fibersarcolemmat-tubulessarcoplasmsarcoplasmic reticulum (SR)myoglobinmitochondriaglycogen granulesmyofibrils = a long row of repeating segments of sarcomeresElizabeth Maxim & Anikó Szabó Hill 2 of 6BIOL 2304/2101 CHAPTER 10- MUSCLE TISSUESarcomeremyofilamentsthin myofilaments = chain of actinsthick myofilaments = bundle of myosinstropomyosintroponinElizabeth Maxim & Anikó Szabó Hill 3 of 6BIOL 2304/2101 CHAPTER 10- MUSCLE TISSUEOverview of Sliding Filament Theory:Elizabeth Maxim & Anikó Szabó Hill 4 of 6BIOL 2304/2101 CHAPTER 10- MUSCLE TISSUEOverview of Neuromuscular Junction or Motor end plate page 401.1) spinal or lower motor neuron, in the ventral horn of spinal cordaxon terminalCa+ channelssynaptic vesiclesneurotransmitter acetylcholine (Ach)presynaptic membrane2) synaptic cleft3) postsynaptic membranesarcolemmareceptors for AchNa+ ion channelenzymes for breaking down AchMotor Unit:One motor neuron + all the muscle fibers that it innervatesElizabeth Maxim & Anikó Szabó Hill 5 of 6BIOL 2304/2101 CHAPTER 10- MUSCLE TISSUEFlowchart of chemical transmission at the NMJElizabeth Maxim & Anikó Szabó Hill 6 of
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