Quiz 7
Which cell is stimulated by the hormones calcitriol and PTH?
E
What is the correct sequence of events in the healing of a bone fracture?
Hematoma formation → soft callus formation → hard callus formation → bone remodeling
Calcitonin
Hormone represented by B
Mature bones are remodeled throughout life via a process known as __________.
appositional growth
What is the blood clot at A called?
hematoma
Bone deposition cell
B
In which stage of ossification does the primary marrow cavity appear?
B
Where would the red bone marrow be found in this adult femur?
B
In which stage of ossification is an epiphyseal plate present?
D
Appositional bone growth is a process that _____.
Forms new bone on the surface of older bone
What type of growth occurs at E?
Interstitial
Arteriosclerosis is one example of ectopic ossification, which means ____.
abnormal calcification of a tissue
Bone elongation is a result of
cartilage growth
The thin layer of slightly denser spongy bone that separates an adults epiphysis from the diaphysis is called the ______.
epiphyseal line
Osteoporosis is more common in elderly females because of the lack of
estrogen
What tissue does stage A primarily consist of?
hyaline cartilage
Which of the following is an inorganic component of the bone matrix? proteoglycans glycoproteins collagen hydroxyapatite glycosaminoglycans
hydroxyapatite
Wolff's law of bone explains the effect of _____.
mechanical stress on bone remodeling
New bone is deposited by cells known as
osteoblasts
A decline in bone density can lead to _____.
osteoporosis
Blood Ca2+ deficiency stimulates __________ secretion, which leads to _____________.
parathyroid hormone, increased osteoclast activity
The result of blood calcium and phosphate levels being too low for normal deposition is a softness of the bones called _______ in children and ______ in adults.
rickets, osteomalacia
Patches of fibrocartilage formed in the healing of a fracture are called ________, whereas the bony collar formed around the fracture is called _________.
soft callus, hard callus
Which of the following is not a function of the skeleton? storage of calcium & phosphate ions storage of red blood cells providing support for most muscles protecting the brain protecting the spinal cord
storage of red blood cells
Red bone marrow does not contain
yellow bone marrow