HUMAN PHYSIOLOGY
LOCOMOTION AND MOVEMENT
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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myosin, troponin
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LMM, HMM
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actin, troponin, tropomyosin
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actin, Ca+
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Detailed explanation-1: -Thus, the correct answer is ‘Troponin, tropomyosin, actin. ‘
Detailed explanation-2: -The Major Components of the Thin Filament: Actin, Tropmyosin, Troponin Complex and Nebulin. The thin filament is the main site of Ca+2 regulation and is composed of four components in striated muscle: actin, TM and troponin (Tn) with its three subunits [25] (Figure 5).
Detailed explanation-3: -The thin filament consists of actin, tropomyosin (Tm), and troponin (Tn) in 7:1:1 stoichiometry, and Tn is composed of three subunits: troponin C (TnC), the Ca2+-binding regulatory subunit; troponin I (TnI), the inhibitory subunit; and troponin T (TnT), the Tm-binding subunit.
Detailed explanation-4: -In vertebrate and many invertebrate striated muscles, thin filaments also contain tropomyosin and troponin, which regulate actin–myosin interactions and thus muscle contraction.
Detailed explanation-5: -So, the correct answer is ‘Actin, troponin, and tropomyosin’.