Anatomy of Muscles: Types, Neuromuscular Junction, Contraction Mechanism, Quizzes of Biotechnology

Download Anatomy of Muscles: Types, Neuromuscular Junction, Contraction Mechanism and more Quizzes Biotechnology in PDF only on Docsity! TERM 1 3 types of muscle DEFINITION 1 cardiac smooth and skeletal TERM 2 Neuromuscular junction is found DEFINITION 2 between a motor neuron's axona nd muscle fiber- axon divides into terminals containng vesicles of ACh TERM 3 the ACh receptor at the neuromuscular junction is DEFINITION 3 ligand gated ion channel TERM 4 when Na+ flows into muscle cell it leads to DEFINITION 4 depolarization and an action potential TERM 5 muscle is a grouping of cells (muscle fibers) bound together by DEFINITION 5 connective tissue TERM 6 tendons link bones to DEFINITION 6 skeletal muscle TERM 7 muscle fascicle DEFINITION 7 bundle of fibersIn anatomy, a fascicle is a bundle of skeletal muscle fibers surrounded by perimysium, a type of connective tissue. TERM 8 the propogation of action potentials causes a rise in the DEFINITION 8 cytosolic Ca2+- released from the sarcoplasic reticulum TERM 9 Transverse tubules are DEFINITION 9 invaginations of plasma mmembrane that conduct the action potential from the otuer surface to inner regions TERM 10 muscle contraction stops when DEFINITION 10 calcium is returned to sarcoplasmic reticulum via ion pump that is powered by ATP TERM 21 myosin crossbridges attach to thin filament and force it toward DEFINITION 21 the center of the sacromere TERM 22 I band is DEFINITION 22 reduced TERM 23 h zone is DEFINITION 23 reduced TERM 24 two proteins that regulate contraction DEFINITION 24 tropomyosin and troponin on THIN filament- actin TERM 25 Tropomyosin DEFINITION 25 in absence of calcium cover myosin binding sites TERM 26 Troponin DEFINITION 26 bound to both tropomyosin and actinwhen Ca2+ present it binds it and drags tropomyosin off yosin binding site and contraction begins TERM 27 4 steps of crossbridge cycle DEFINITION 27 -cross bridge binds to actincross bridge moves and filament slides past each other --> POWER STROKEATP binds to myosin causing cross bridge to detachHydrolysis of ATP reenergiszes the cross bridge