BargerW_HWCH7

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Tri-County Technical College *

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Anatomy

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Apr 3, 2024

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docx

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OpenStax Anatomy & Physiology 2e Student Answer Sheet Anatomy & Physiology 2e Unit 2: Support and Movement Chapter 7: Axial Skeleton Textbook Reference: https://openstax.org/books/anatomy-and-physiology-2e/pages/7-introduction Interactive Link Questions 1. Watch this video (http://openstaxcollege.org/l/skull1) to view a rotating and exploded skull with color-coded bones. Which bone (yellow) is centrally located and joins with most of the other bones of the skull? A: Sphenoid 3. Osteoporosis is a common age-related bone disease in which bone density and strength is decreased. Watch this video (http://openstaxcollege.org/l/osteoporosis) to get a better understanding of how thoracic vertebrae may become weakened and may fractured due to this disease. How may vertebral osteoporosis contribute to kyphosis? A: Postural changes due to pain along with loss of vertebral height due to compression fracture susceptibility. 5. Use this tool (http://openstaxcollege.org/l/vertcolumn) to identify the bones, intervertebral discs, and ligaments of the vertebral column. The thickest portions of the anterior longitudinal ligament and the supraspinous ligament are found in which regions of the vertebral column? A: Review Questions 7. Which of the following is part of the axial skeleton? A: D 9. The axial skeleton ________. A: B 11. The lambdoid suture joins the parietal bone to the ________. A: B 13. The paranasal sinuses are ________. A: A 15. The bony openings of the skull include the ________. A: D 17. The primary curvatures of the vertebral column ________. A: B 19. A typical lumbar vertebra has ________.
OpenStax Anatomy & Physiology 2e Student Answer Sheet A: A 21. The sternum ________. A: B 23. The tubercle of a rib ________. A: A 25. Embryonic development of the axial skeleton involves ________. A: B Critical Thinking Questions 27. Define the two divisions of the skeleton. A: The Axial Skeleton is used as the framework of the body which provides structural support and protects vital organs. This consists of the ribcage, skull, and vertebral column. The Appendicular Skeleton allows movement via limbs and joints. It includes the shoulder girdle, pelvic girdle, arms, hands, fingers, legs, and feet. 29. Define and list the bones that form the brain case or support the facial structures. A: Frontal Bone forms the roof of the orbits and the forehead. The Parietal bones for the sides and top of the skull. The temporal bones are located on the sides of the skull. The Occipital bone is on the back and base of the skull where the spinal column passes through. The Sphenoid bone is located at the base of the skull. The ethmoid bone is at the front of the skull and forms the nasal cavity and the medial walls of the orbits. Maxilla Forms the upper jaw and holds teeth. Zygomatic bones form the prominence of our cheeks. Palatine Bones form the posterior part of our hard palate and nasal cavity. Nasal Bones form the bridge of the nose. Lacrimal Bones form the medial wall of the orbits. The Vomer foms the inferior part of our nasal septum. The mandible forms our lower jawbone and is the only movable bone in the skull. 31. Describe the anterior, middle, and posterior cranial fossae and their boundaries, and give the midline structure that divides each into right and left areas. A: The Anterior Fossa is the most superior and anterior of the three. It is bounded by the frontal bone, the lesser wing of the sphenoid bone and the crista galli of the ethmoid bone. The Middle Fossa is in the middle (in between the anterior and posterior Fossae). It is bounded by the lesser wing of the Sphenoid, the petrous part of the temporal and greater wing of the sphenoid. The Posterior Fossa is in the back of the skull and is the most inferior of the fossae. It is bounded by the petrous part of the temporal bone, the occipital bone, and the mastoid part of the temporal bone. The Midline structure is the internal occipital crest. 33. Describe the vertebral column and define each region.
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