axial skeleton - 6 Skeletal System: Introduction and the...

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6 Skeletal System: Introduction and the Axial Skeleton Answers and Explanations I. Organization of the Skeletal System A. Multiple Choice Questions 1. (d) – Age is of significance because of the fusing of separate bones as a person grows. Furthermore, genetic factors also may account for individual differences in the number of bones. 2. (b) – The patella is an example of a sesamoid bone formed in a tendon. 3. (c) – The ossa coxae (hipbones) are a part of the pelvic girdle in the appendicular skeleton. 4. (a) – The vertebral column is a major structure of the axial skeleton. B. True-False Questions 1. False – There are more bones in an infant than in an adult. Many bones fuse as the infant grows. 2. False – Everyone has sesamoid bones, two of which are the patellae (kneecaps). 3. False – The hyoid bone is an irregular bone. Sutural bones are found in the lambdoid suture. 4. False – The pectoral girdle is not a complete girdle because it lacks a posterior attachment to the axial skeleton. II. Functions of the Skeletal System A. Multiple Choice Questions 1. (d) – Coordination involves the nervous and muscular systems. 2. (c) – Muscles are attached to and cover many of the bones in the body, and thus are not protected by the skeletal system. 3. (d) – Adequate amounts of dietary calcium and phosphorous are important in maintaining healthy bones. 4. (a) – The skeletal system is involved in the support, movement, and protection of the body, as is the muscular system. B. True-False Questions 1. False – The spleen and liver are responsible for hemopoiesis in infants. 2. True – Calcium and phosphorous are the major components of bone matrix, which is the hard, dense portion of bone. 3. False – The living cells within bone provide flexibility. 4. True – All visceral organs are directly or indirectly supported by bone, and a number of other organs are also protected by the skeletal system. III. Bone Structure A. Multiple Choice Questions 1. (c) – Although some bones are relatively thick, they are not classified by thickness. 2. (c) – A long bone is shaped like a lever and functions as such in the movement of the body. 3.
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axial skeleton - 6 Skeletal System: Introduction and the...

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