Question

s. In relationship to the diaphysis of a long bone, the osteons are Calcium is found in crystals called 7. The of spongy bone are organized along stress lines. Bone growth in length occurs by mitosis of cartilage cells in the epiphyseal side of the Bone tissue formation begins when During secrete protein fibers. growth bones grow wider. . When the plate is replaced by bone, long bones have reached their adult length. When cartilage is produced at the epiphyseal side of the metaphysis at the same rate as bone is deposited on the opposite side, bones grow s. Accelerated closure of the epiphyseal plates could be caused by elevated levels of 4 When production of sex hormones increases at puberty, epiphyseal plates become Use figure to answer questions 15-17 s Growth in length occurs at cartilage occurs at #1 ossification is shown at #6 17 ıx In normal adult bones, a portion of the protein and mineral content is replaced each 19. The production of precursors for the synthesis of calcitriol occurs in the 20 The hormone functions to decrease the level of calcium ion in the blood. is involved in calcium absorption by the digestive tract. 21 The disease causes calcium loss from the skeleton, which would result in bones that are weaker and more flexible. 3. The condition known as causes a gradual reduction in bone mass. 24 If osteoclasts are more active than osteoblasts, bones will become 2s Osteoporosis affects more women than men because women have a 26 Aging results in loss of and in sex hormones after menopause.

Answer 1

5. Parallel.

Osteons are cylindrical structures that contain a mineral matrix and living osteocytes connected by canaliculi. They are aligned parallel to the long axis of the bone.

6. Hydroxyapatite.

Calcium is found in crystals known as hydroxyapatite.

7. Trabeculae.

The bone matrix is organized into a three-dimensional latticework of bony processes known as trabeculae, which are arranged along stress lines.

8. Metaphysis.

Bone development in length occurs by the process of mitosis of cartilage cells in the epiphyseal side of the metaphysis.