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Physiology Wk 5 Quiz
| Question | Answer |
|---|---|
| Normally, bone loss will begin to exceed bone gain between the ages of _____ years. | 35 and 40 |
| Which of the following is not dependent on the proper amount of calcium ions in the blood? | None; Blood clotting. transmission of nerve impulses, and contraction of cardiac muscle are all dependent on the proper amount of calcium ions in the blood. |
| Young children’s bones have a greater risk of fracturing because of incompletely ossified bone. | False |
| After the age of 50, the density of bone: | decreases slowly because of a shift in the remodeling activity. |
| The humerus articulates proximally with the clavicle. | False |
| Until bone growth in length is complete, a layer of the cartilage, known as the _____, remains between the epiphysis and diaphysis. | epiphyseal plate |
| An age-related skeletal disease that is characterized by loss of bone mineral density and increased bone fragility is | osteoporosis |
| In intramembranous ossification, the process of appositional growth refers to the: | addition of an outside layer of osseous tissue on flat bones. |
| In the epiphyseal plate, the zone of hypertrophy is in the _____ layer. | third |
| As the activity of osteoblasts increases, the: | amount of calcium in increases and the level of calcium in blood decreases. |
| Appositional growth of cartilage occurs when chondrocytes begin to divide and secrete | additional matrix |
| Which of the following is not a characteristic of the epiphyses? | cylindrical in shape |
| The humerus articulates proximally with the | scapula |
| Before childbirth, the symphysis pubis softens. | true |
| Calcification of the organic bone matrix occurs when | complex calcium salts are deposited in the matrix. |
| Which of the following is not one of the primary functions performed by bones? | hormonal production |
| Hematopoiesis is carried out in the: | red bone marrow |
| Because of how the clavicle articulates with the scapula, all shoulder movements involve the sternoclavicular joint. | true |
| The following are functions of bone except for | support, protection, mineral storage, hematopoiesis (all) |
| Blood calcium levels involve secretion of which two hormones? | parathyroid and calcitonin |
| The ulna articulates proximally with the: | humerus |
| Bones grow in diameter by the combined action of which two of the three bone cell types? | osteoblasts and osteoclasts |
| The primary ossification center of a long bone is located: | in the diaphysis. |
| In bone growth, the medullary cavity is enlarged because of the activity of: | osteoclasts |
| Which of the following may cause skeletal variations? | Age, Mechanical stress, and Inadequate supply of calcium and vitamin D. (all) |
| A person with a fractured patella would expect discomfort in the: | knee |
| In bone formation, the cells that produce the organic matrix are the: | osteoblasts |
| Bones act as a reservoir for which of the following minerals? | Calcium and Phosphorus |
| Small cells that synthesize and secrete a specialized organic matrix are | osteoblasts |
| The cells responsible for active erosion of bone minerals are called: | osteoclasts |
Created by:
Janelleu4771
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