Anne has trouble moving the muscles of facial expression that are located just deep to the skin. Of what kind of a problem could this be an indication?
Brian decided to enter a 5-mile race designed to raise money for a class trip. He did not do any preconditioning, nor had he ever jogged before. The morning after the race, Brian had so much pain in both his anterior legs that he was unable to go to school. What caused this pain?
What class of lever system do the following activities describe? (a) The soleus muscle plantar flexes the foot. (b) The triceps brachii is strained while doing pushups.
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