A&P 1 Chapter 7 part 1
Which is true?
B.Osteoblasts deposit bone matrix around themselves and become osteocytes when they are isolated in lacunae.
Which of the following is not found in spongy bone?
B.Osteons.
The white material that reduces friction at the ends of bones is called
B.articular cartilage.
The type of calcium phosphate forming most of the inorganic salts in bone extracellular matrix is.
B.hydroxyapatite.
A vitamin D deficiency results in ______, whereas a vitamin A deficiency results in ______.
B.rickets; retardation of bone development
Compact bone has ________, whereas spongy bone has __________.
B.tightly packed tissue that is solid, strong, and resistant to bending; cancellous bone that reduces the weight of bone
It is possible to determine if a child's long bone is growing by examining a radiograph of the
C.epiphyseal plate.
The thyroid hormone thyroxine can ______ bone growth by ______.
C.increase; stimulating osteoblast activity in the epiphyseal plate
Sex hormones stimulate
C.ossification of epiphyseal plates.
At what age are all bones normally ossified?
D.25 years
Which of the following four groups of bones, based on shape and with an example of each, is correct?
D.Irregular bones-bones of the backbone
Osteoclasts are
D.bone cells that resorb bone tissue.
Pituitary dwarfism results from a decreased secretion of ______ hormone, which decreases production of ______.
D.growth; cartilage cells in the epiphyseal plate
Which of the following is(are) an example of an intramembranous bone?
A.Broad, flat skull bones
Articular cartilage is
D.hyaline cartilage.
A bone thickens by
A.activity of osteocytes in the medullary cavityB.increased secretion of calcium salts by osteoclasts.C.increased activity of the epiphyseal plate.D.adding blood vessels and nerves. *E.none of the above.
A bone includes
A.living material and nonliving material.
Endochondral ossification ______, whereas intramembranous ossification ______.
A.replaces hyaline cartilage; replaces undifferentiated connective tissue
The presence of an epiphyseal plate indicates that:
A.the bone is lengthening.
Which of the following is not a step in endochondral bone formation?
C.Hyaline cartilage changes to adipose tissue..
Which of the following is not a function of bone?
C.To provide nervous communication from bone to muscle.
A six-month-old baby is admitted to the hospital for the third time for a broken bone, and the parents are arrested on charges of child abuse. The defense lawyer gets the charges dropped after the results of genetic tests come back for which condition?
C.osteogenesis imperfecta.
The bones of the wrists and ankles are classified as
C.short bones.
Exercise ______ and _______ bones.
C.thickens; strengthens
