Question

30. What protein based, muscular structure is NOT an essential component of the thin filaments of a sarcomere as per the sliding filament theory model of contraction?

a. Actin c. Troponin b. Myosin d. Tropomyosin

31. Skeletal muscle’s inherent ability to contract and stretch while still continuing to return to its original length is known as:

a. Extensibility c. Contractility b. Elasticity d. Excitability

32. Which of the following is NOT a muscle of the lower appendicular muscle system?

a. Biceps Femoris c. Gluteus Maximus b. Biceps Brachii d. Adductor Magnus

33. Which situation would require the most motor units of a muscle to be recruited?

a. Isometric contraction, slow movement c. Concentric contraction, Slower movement b. Isotonic contraction, fast movement d. Eccentric contraction, light load

Answer 1

30) Thin filaments consist of actin, troponin and tropomyosin.Myosin constitutes thick filaments, not thin filaments.

So answer is myosin.

31)The ability of the skeletal muscle (or any object) to contract or relax,while continuing to return to original length is called elasticity.

32)Biceps brachii is a muscle of the arm.Gluteus maximus is muscle in gluteal region (hip) , biceps femoris and adductor magnus in the thigh region.

So answer is biceps brachii.

33)Answer is isotonic contraction with fast movement.