Question

4. A bone tumor disrupts the normal structure of osteons, replacing the organized rings with disorganized, irregular masses of bone. How will this affect the ability of a bone to perform its functions?

5. A gymnast lands badly after a vault and “twists” her ankle. She now has significant pain and swelling over her lateral ankle area, and her coach is worried that she might have an ankle fracture. Which bone is involved in her injury? What is the specific part of the bone that is injured?

6. Most fibrous joints allow _____________________________ between the articulating bones.

A. No motion.

B. Some motion.

7. Synovial joints are surround by a/an _________________________ and filled with __________________________

A. Articular disc, serous fluid

B. Joint capsule, synovial fluid

C. Articular cartilage, serous fluid

D. Articular disc, synovial fluid

8. Which of the following correctly describes abduction?

A. Abduction decreases the angle between two bones.

B. Abduction moves a body part toward the midline of the body.

C. Abduction moves a bone around its own axis.

D. Abduction moves a body part away from the midline of the body.

9. How would the function of synovial joints be changed if they lacked joint cavities and the bones were united instead? Explain.

Answer 1

4. Function of the bone is to provide support and bears the weight of the body. It also provide surface for muscle attachement. Disruption of the structure of bone by tumour may lead to fracture of the bone and abnormal detachment of the muscles with various types of disabilities.

5. Lateral malleolus of the fibula might be fratured.

6. a. no motion

Explanation: Fibrous joints are immovable joint such as suture and gomphosis

7. B. Joint capsule, synovial fluid

8. D. Abduction moves a body part away from the midline of the body.