Bio 225 - Test 2 HW
Lamellae
What is the term for the layers of bony matrix surrounding the vessels and nerves?
What divalent cation is required to create additional bone matrix support?
Calcium
Osteoblasts
Classify the cells seen at the arrow in a image A
Which of the following statements is true?
During endochondral ossification, hyaline cartilage is broken down and replaced with bone.
Which contributes most directly to the hardness of bone?
Hydroxyapatite
For intramembranous ossification to take place, which of the following is necessary?
Ossification centers form in the fibrous connective tissue membrane
Store calcium on bone, lowering plasma calcium levels
Osteoblast
Which description of bone cells is incorrect?
Osteopenia cells can differentiate into osteoclasts
Cartilage grows in two ways, AP positional and interstitial. What is appositional growth?
The secretion of a new matrix against external face of the existing cartilage.
Chondrocyte hypertrophy and deterioration
What event at letter B leads to elongation of the bone?
trabeculae
What bone-associated structures in panel C are indicated by the arrow?
The formation of bone in a membrane
Which of the following best describes the process shown above?
Periosteum; dense irregular connective tissue
Which of the following correctly pairs structure C with its primary component?
D
Which step in the figure contains compact bone?
Which hormone is currently thought to decrease plasma calcium levels in pregnant women and children?
calcitonin
PTH promotes the formation of which hormone?
calcitriol
Which hormone works directly in the intestine to increase plasma calcium levels?
calcitriol
Which of the following are correctly matched?
compound fracture; the fractured bone ends penetrate the skin
What single factor plays the largest role in maintaining adequate bone strength?
gravity