1. The muscle that closes the eyes is (a) the occipitalis, (b) the zygomaticus, (c) the corrugator supercilii, (d) the orbicularis oris, (e) none of these.
2. The sternocleidomastoid muscles help to (a) elevate the first ribs, (b) elevate the second ribs, (c) flex and rotate the head laterally, (d) extend the head.
3. The chewing muscles that protract the mandible and grind the teeth from side to side are (a) the buccinators, (b) the masseters, (c) the temporalis, (d) the pterygoids, (e) none of these.
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