questions

I need a minimal of 200 words (no more than 300), original work, and references!

1. Winning a one-month membership to a health club changed Bob’s life. He gave up junk food and now works out daily. In one of his aerobic exercises, he slowly flexes his elbow and supinates his right hand while lifting a 35-pound weight; then he lowers the weight back to its starting position. He repeats this process several times. After reading 

chapter 9

 and building on your previous knowledge about bone anatomy and joints in 

chapters 7

and 

8

, explain how Bob’s muscles are able to lift and lower the weight slowly.

2. On December 26, Shirley packed up her collection of 67 ceramic Santas and lugged them downstairs to her basement storeroom. While carrying the last box down the steps, she strained her back and damaged a vertebral disk. The bulged disk placed pressure on the left side of the spinal cord, compressing the third lumbar spinal nerve, which innervates the following muscles: psoas major, iliacus, pectineus, sartorius, vastus lateralis, vastus medius, vastus intermedius, and rectus femoris. As a result, action potential conduction to these muscles was reduced. Using your new knowledge about the histology and physiology of the muscular system from chapter 9 and combining it with the information about gross muscle anatomy in this chapter, predict Shirley’s symptoms and which movements of her lower limb were affected, other than walking on a flat surface. What types of household tasks would be difficult for Shirley to perform?