c. Eversion of the foot. d. Inversion of the foot. 39, What is the main action o
ID: 216920 • Letter: C
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c. Eversion of the foot. d. Inversion of the foot. 39, What is the main action of the fibularis longus? a. Dorsiflexion of the ankle b. Plantarflexion of the ankle. 40. When climbing stairs, which muscle or muscle group flexes your knee? a hamstring group b. tibialis anterior c. iliopsoas d. quadriceps femoris group 41. Which muscle is an antagonist to the gastrocnemius muscle? a. tibialis anterior c. extensor digitorum longus b. soleus d. plantaris 42. The quadriceps femoris group includes all of the following EXCEPT: a. vastus medialis b. vastus lateralis c. biceps femoris. d. vastus intermedius. 43. Which muscle abducts the thigh, medially rotates the thigh, and stabilizes the pelvis during walking? a. biceps femoris c, semimembranosus d. obturator extemus b. gluteus minimus 44. Which group is an antagonist to the hamstrings group? a. quadriceps femoris group c. adductor muscle group d. iliopsoas muscle group b. gluteal muscle group 45. Which of the following statements about myofilaments is false? a. Elastic filaments are composed of the protein titin. b. Both thick and thin filaments contain the contractile protein myosin. c. Thin filaments of skeletal muscle contain the regulatory proteins troponin and tropomyosin. d. Thick filaments contain the contractile protein myosin. 46. Which of the following statements regarding the phases of an action potential is true? a. The membrane is depolarized at rest. b. The resting membrane potential of the fiber is positive - the inside of the fiber is positive c. Potassium ions rush into the fiber during repolarization, and the membrane potential d. Sodium ions rush into the fiber during depolarization, and the membrane potential becomes with respect to the outside of the fiber. becomes more negative more positiveExplanation / Answer
39.C. Eversion of the foot.
40.A. Hamstring muscle are responsible for flexing of the knee.
41.A. Tibialis Anterior muscle. The gastrocnemius muscle function is plantar flexing the foot at the ankle joint and flexing the leg at knee joint. Whereas the Tibialis anterior muscle acts to dorsiflex and inversion of the foot. It acts as antagonist to plantar flexors of the posterior compartment such as gastrocnemius muscle.
42.C.The fourth one is rectus femoris
43.B.Gluteus minimus.
44 A. Quadriceps femoris group acts antagonist to hamstring muscle as it acts to extend the leg.
45.B.thin filaments contains actin protein not the myosin.
46.D.
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