Chapter 10.5, Problem 22BYGO

What type of muscle contraction is required at the hip during the action of moving from standing to sitting down in a chair? isometric, eccentric or concentric? What muscles are producing the force at the hip during this movement?

While painting the house, Mila fell off the ladder and fractured her left clavicle. Treatment prescribed by the emergency room physician included the use of a sling for her left arm to immobilize the clavicle and speed up its healing. Which among the following muscles are temporarily "put out of business" by the sling?     extensor carpi ulnaris and extensor carpi radialis     trapezius and deltoid     trapezius and erector spinae     flexor carpi ulnaris and extensorn digitorum

For a martial arts student doing the "praying mantis", what muscles Pronate the forearm? Flex the elbow? Flex the wrist? Flex the shoulder?

What are two factors which allow the gastrocnemius and soleus muscles to generate greater plantar flexion torque than all the other muscles capable of plantarflexion?

Why do some people lack a palmaris longus muscle?

Why do you suppose there are more and larger muscles involved in plantar flexion of the foot than dorsiflexion?

For a martial arts student doing the "praying mantis", what muscles Flex the shoulder? Flex the elbow? Flex the wrist? Pronate the forearm?

Which of the following movements among the nine muscle groups? Flexion Extension  Abduction  Adduction  All are correct.

What type of lever is the vastus medialis? Support your answer with a free body diagram. The vasti muscles are used both for sit-to-stand AND stand-to-sit movements. Which of these two tasks represents a concentric contraction and which represents an eccentric contraction? Which muscle (vastus lateralis or medialis) do you think is more important for doing a slow, controlled stand-to-sit transition? If you witnessed your grandfather "plopping" (doing an uncontrolled sit) into a chair, would you recommend giving him eccentric or concentric strengthening exercises for his vasti muscles? Justify your answer.