Seborrheic dermatitis is most common during __________.?

A patient has referred pain to her left shoulder. Which of the following should the EMT suspect?

A) Hemorrhage from the spleen B) Rupture of the small intestine C) Damage to the gallbladder D) Trauma to the right kidney

Although body movement is usually produced by a group of muscles, one muscle is responsible for most of the movement. This muscle is called the agonist or ________. 

Fill in the blank(s) with the appropriate word(s).