Which of the following is common among athletes engaged in overhead activities and involves tenderness in the anterior upper arm?

Which stage(s) of sleep is (are) shown in the figure?

a. Stage 1 sleep c. Stages 3 and 4 sleep b. Stage 2 sleep d. Rem sleep

The small cartilaginous flap extending over the opening to the ear is referred to as the _____________.

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