A discussion of microscopic muscle contraction should includeall activities, chemicals and structures involved in musclecontraction. So a discussion of the depolarization of thesarcolemma, the role of the ACH receptor, sodium and potassium ingenerating an action potential as well as the role of calcium, Ttubules, the sarcoplasmic reticulum and tropomycin is expected. Youshould describe the myofilaments and the process of the slidingfilaments. A discussion of the contraction of a whole muscle shouldinclude the macroscopic structures of a muscle and the motor endplates, connective tissue covering and the relationships betweenthese structures.
