Muscle Physiology Muscle Fiber Anatomy 1 Electrochemical equilibrium 2 If resting potential can change it means that the cells are 3 Name 2 types of cells that are excitable 4 Muscle and nerve cells have channels which make them excitable 5 Type of gated Active Channel where chemical binds to a receptor to open gate 6 Type of gated Active Channel where have change in electrical charge within cell 7 Chemical changes in the cell make it go from resting potential to an 8 is made up of the synaptic knob motor plate 9 is the region with many channels that are chemically regulated 10 are bags of neurotransmitters that can break and release chemicals 11 Events by which transmission of an action potential along sarcolemma causes myofilaments to slide 12 is the cell membrane of skeletal cell 13 are the indentation along the sarcolemma 14 are bags around the T tubules 15 T tubule 2 terminal cristerna 16 What chemical bursts the synaptic vesicles 17 What neurotransmitter is stored in the synaptic vesicles 18 The release of AcH allows what chemical to flow into the cell 19 At rest the muscle cell is what chemical causes an action potential of the cell cell becomes 20 Voltage regulated channels on sarcoplasmic reticulum open when 21 A stimulus causes a wave of which is going from to 22 Put the following events of excitation in chronological order 1 Chemically regulated channels on motor plate open and Na goes into cell 2 Voltage regulated channels let Ca 2 into nerve cell 3 Stimulus causes depolarization 4 Voltage regulated channels on terminal cisterna sarcolemma open allowing Ca 2 into cell 5 Ca 2 ruptures synaptic vesicles and AcH then binds to receptors 23 Where does the majority of the Ca 2 come from during excitation contraction 24 What are the terminal cisterna made up of 25 What is the main purpose of excitation 26 is the plasma membrane of a muscle fiber 27 The contains myofilaments 28 contain thick and thin filaments 29 What is the functional unit of skeletal muscle 30 The line serves as an anchor for thin filaments 31 The line serves as an anchor for thick filaments 32 Thick filaments the band 33 The band contains NO thick filaments 34 zone is an area of thick filaments where NO thin filaments overlap ANSWERS 1 Resting potential 85 mV 2 excitable 3 nerve and muscle cells 4 Active Channels 5 chemically gated 6 voltage regulated 7 Action Potential to 8 Neuromuscular Junction 9 motor end plate 10 synaptic vesicles 11 Excitation Contraction Coupling 12 sarcolemma 13 T tubules 14 terminal cisterna 15 triad 16 Ca 2 17 acetycholine AcH 18 Na 19 Na 20 have wave of charge depolarization 21 depolarization 22 3 2 5 1 4 23 terminal cisterna or inside the cell 24 sarcoplasmic reticulum 25 get Ca 2 into cell increase intracellular Ca 2 levels 26 Sarcolemma 27 Myofibril 28 Myofilaments 29 sarcomere 30 Z line 31 M line 32 A band 33 I band 34 H zone
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