KINE 1020 Lecture Notes - Lecture 20: Myosin Head, Skeletal Muscle, Cardiac Muscle
29 Mar 2016
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Document Summary
Categories of muscle: skeletal muscle i. ii. iii. Heat production during cold stress: cardiac muscle i. ii. Sarcomere proteins: actin (3 units) associated with troponin; tropomyosin, myosin head and tail regions contains binding sites for actin and atp, actin-myosin interaction - contraction. An alpha-motor neuron connects and innervates muscle fibres. The process is initiated by an electric signal action potential (from the brain/spinal cord to amn) The ap travels down the axon terminals releasing ca2+ An ap must be generated before the muscle can act. Ca2+ and the thin filament: actin molecules form coiled chains, tropomyosin molecules run along actin, blocking cross bridge binding sites, troponin holds tropomyosin in place. Sliding filament mechanism: the sequence of events that occurs between the time a cross bridge binds to a thin filament, moves and then is set to repeat the process is known as the.
