This lesson starts with a recall of actin and myosin structure. Then probes further in the the roles of the regulatory proteins troponin and tropomyosin. The structure of the sarcomere is covered including identifying parts on a micrograph. Later, the process of contraction is covered as per the sliding filament theory. the cross bridge cycle is covered in details including the role of calcium, ATP and the regulatory proteins. Exam questions included.
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