anatomy and physiology

multiaxial

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function of the muscular system

• movement, stability, control of body, Hormone secretion, Glycemic control heat protection

• movement, Hormone secretion, control of body, Glycemic control

• movement, control of body, stability, Glycemic control

Individual muscle groups have a fine sheath of connective tissue

• Endomysium

• Perimysium

• Fascia

• Epimysium

Myofibrils

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Axon terminal

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Synaptic vesicles

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ACh receptor

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first step of muscle Excitation

• Binding of ACh to receptor

• Arrival of nerve signal

• Acetylcholine ACh release

second steps of muscle Excitation

• Acetylcholine ACh release

• Binding of ACh to receptor

• Opening of voltage-regulated ion

Describe the step one of Excitation-Contraction Coupling

• Calcium released from terminal cisterns

• Action potentials propagated down T tubules

• Shifting of tropomyosin exposure of active sites

• Binding of calcium to troponin