MBLEx Domain 2: Kinesiology Welcome to your MBLEx Domain 2: Kinesiology 1. MBLEx: Kinesiology Which structure is primarily responsible for proprioception in the muscle? A. Golgi tendon organs B. Muscle spindles C. Ruffini endings D. Pacinian corpuscles None 2. MBLEx: Kinesiology During the concentric phase of a bicep curl, which type of muscle contraction occurs in the biceps brachii? A. Isometric B. Eccentric C. Isokinetic D. Concentric None 3. MBLEx: Kinesiology Which of the following is not a component of a sarcomere, the basic unit of muscle fiber? A. Actin B. Myosin C. Sarcolemma D. Tropomyosin None 4. MBLEx: Kinesiology In which phase of a plyometric movement does the muscle lengthen before immediately contracting? A. Concentric phase B. Eccentric phase C. Amortization phase D. Isometric phase None 5. MBLEx: Kinesiology What term describes the smallest motor units activated by the nervous system under low force demands? A. All-or-none principle B. Henneman's size principle C. Motor unit recruitment D. Wave summation None 6. MBLEx: Kinesiology Which muscle action occurs without any change in muscle length, despite force being applied? A. Isotonic B. Isokinetic C. Isometric D. Eccentric None 7. MBLEx: Kinesiology Which muscle fiber type is characterized by high capacity for aerobic energy supply but low power output? A. Type I fibers B. Type IIx fibers C. Type IIa fibers D. Intermediate fibers None 8. MBLEx: Kinesiology What is the role of the rotator cuff muscles in shoulder movement? A. Primarily to flex and extend the shoulder B. To adduct and abduct the shoulder C. To stabilize the glenohumeral joint D. To rotate the forearm None 9. MBLEx: Kinesiology The sliding filament theory describes the process of muscle contraction involving the sliding of which two filaments? A. Actin and myosin B. Actin and elastin C. Myosin and collagen D. Actin and sarcolemma None 10. MBLEx: Kinesiology What is the primary action of the gastrocnemius muscle? A. Dorsiflexion of the foot B. Inversion of the foot C. Plantar flexion of the foot D. Eversion of the foot None 11. MBLEx: Kinesiology Which ligament limits the anterior translation of the tibia on the femur? A. Lateral collateral ligament (LCL) B. Anterior cruciate ligament (ACL) C. Posterior cruciate ligament (PCL) D. Medial collateral ligament (MCL) None 12. MBLEx: Kinesiology What phenomenon describes the increased force of muscle contraction as a result of increased speed of contraction? A. Length-tension relationship B. Force-velocity relationship C. Stretch-shortening cycle D. All-or-none principle None 13. MBLEx: Kinesiology Which structure acts as a shock absorber in the knee joint? A. Meniscus B. Bursa C. Tendon D. Ligament None 14. MBLEx: Kinesiology The SITS muscles refer to which group of muscles? A. Hamstrings B. Rotator cuff muscles C. Quadriceps D. Hip flexors None 15. MBLEx: Kinesiology During an overhead press, which muscle is primarily responsible for extending the elbow? A. Biceps brachii B. Triceps brachii C. Deltoid D. Brachialis None 16. MBLEx: Kinesiology Which nerve is commonly associated with carpal tunnel syndrome due to compression? A. Ulnar nerve B. Radial nerve C. Median nerve D. Axillary nerve None 17. MBLEx: Kinesiology What is the primary function of the serratus anterior muscle? A. Adduction of the shoulder B. Abduction of the shoulder C. Upward rotation of the scapula D. Downward rotation of the scapula None 18. MBLEx: Kinesiology The ability of a muscle to return to its original length after being stretched is known as: A. Elasticity B. Flexibility C. Extensibility D. Plasticity None 19. MBLEx: Kinesiology Which muscle is primarily involved in the lateral rotation of the thigh? A. Gluteus maximus B. Gluteus medius C. Adductor magnus D. Psoas major None 20. MBLEx: Kinesiology In the context of muscle fiber arrangement, what does the term "pennate" refer to? A. Fibers running parallel to the length of the muscle B. Fibers running at an angle to the tendon C. Fibers arranged in a circular pattern D. Fibers that are branched None 1 out of 20 Time is Up! Time's up