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SG DSO104A0 0199 PRACTICAL EXERCISE Head Anatomy and Physiology Complete the following practical exercise and check your answers with the answer key at the end of the exercise. If you incorrectly answered any of the items, review that part of the lesson again. 1. Which cranial bone forms the forehead, part of the floor of the cranium, and most of the orbits? 2. a. Parietal. b. Frontal. c. Temporal. d. Occipital. Which cranial bone does the spinal cord pass through? a. Sphenoid. b. Ethmoid. c. Occipital. d. Frontal. 3. Which cranial bone forms the anterior of the base of the skull? a. Occipital. b. Parietal. c. Ethmoid. PE-A-4-1 SG DSO104AO 0199 d. Sphenoid. 4. Which cranial bone contains honeycomb like spaces and forms part of the floor of the cranium, the orbit, and the nasal cavity? a. Sphenoid. b. Frontal. c. Ethmoid. d. Parietal. 5. Which cranial bone forms most of the roof and upper sides of the skull. a. Occipital. b. Parietal. c. Sphenoid. d. Temporal. 6. Which cranial bone forms the sides and base of the cranium and encloses each ear? a. Temporal. b. Frontal. c. Occipital. d. Sphenoid. PE-A-4-2 SG DSO104A0 0199 7. Which facial bones make up part of the inner angle of the eye? a. Nasal. b. Inferior Nasal Conchae. c. Lacrimal. d. Mandible. 8. Which facial bone forms the lower jaw and is the longest and strongest bone of the face? a. Palatine. b. Zygoma. c. Vomer. d. Mandible. 9. Which facial bone forms the prominence of the cheek and the lateral wall and floor of the orbit? 10. a. Zygoma. b. Inferior Nasal Conchae. c. Lacrimal. d. Vomer. Which facial bone forms the base for the nasal septum? a. Vomer. PE-A-4-3 SG DSO104AO 0199 b. Mandible. c. Vomer. d. Nasal. 11. Which facial bone is scroll like and forms the lower part of the interior of the nose? a. Mandible. b. Inferior Nasal Conchae. c. Hyoid. d. Palatine. 12. Which facial bone functions to support the tongue and other muscles? a. Hyoid. b. Maxillae. c. Zygoma. d. Palatine. 13. Where is the Temporomandibular Joint (TMJ) located and what is its function? ___________________________________________________________ ___________________________________________________________ ___________________________________________________________ PE-A-4-4 SG DSO104A0 0199 14. What are the muscles of mastication used for? ___________________________________________________________ 15. What is the function of the temporal muscle? ___________________________________________________________ 16. What is the function of the masseter muscle? ___________________________________________________________ 17. The internal ptergyoid muscle _____________ the jaw. 18. The external ptergyoid muscle aids in opening the __________ and restoring the teeth to ______________. 19. The internal and external ptergyoid muscles together act to __________ __________ __________. ANSWER KEY 1. b. 2. c. 3. d. PE-A-4-5 SG DSO104AO 0199 4. c. 5. b. 6. a. 7. c. 8. d. 9. a. 10. a. 11. b. 12. a. 13. It is located between the temporal bone and the mandible and functions entirely in unison to permit specialized hinge and glide movements. 14. It is used for the purpose of opening and closing the mouth. 15. It raises the mandible and closes the jaw. 16. It raises the mandible and closes the teeth. 17. closes. 18. mouth, occlusion. 19. protrude the mandible. PE-A-4-6