28. A joint united by fibrocartilage tissue that usually permits a slight degree of movement is a A) suture B) syndesmosis C) gomphosis D) symphysis 29. Performing "jumping jacks" requires A) flexion and extention B) pronation and supination C) abduction and adduction D) inversion and eversion 30. Which of the following is not a function of the integument? A) acts as a physical barrier B) stores calcium in the dermis C) regulates temperature through vasoconstriction and vasodilation of dermal blood vessels D) participates in immune defense Extra credit: 31. Melanocytes and keratinocytes work together in protecting the skin from UV damage when keratinocytes A) provide the melanocyte with nutrients necessary for melanin synthesis B) accumulate the melanin granules on their superficial portion, forming a UV-blocking pigment layer C) maintain the appropriate pH in order for the melanocyte to synthesize melanin granules D) maintain the appropriate temperature so the product of the melanocyte will not denature 32. An individual with a "double-jointed" thumb can pull it back towards the wrist much farther than normal. What does it mean to be "double-jointed?" A) the joint capsules and ligaments are more stretchy and loose than normal B) the additional joint present doubles the range of motion C) greater than normal production of serous fluid lubricates the joint and extends it D) articular cartilage at bone ends is replaced with hyaline cartilage