55. What stimulates the secretion of sweat?
a. high temperatures
b. sex hormones
c. UV radiation
d. low temperatures
56. Which dietary requirement for bone health can be made in response to skin exposure to UV
light?
a. vitamin C
b. vitamin D
c. vitamin K
d. calcium ions
_57. Which of the following is an appropriate skin response to cold?
a. arrector pili muscles contract
b. dermal blood vessels dilate
c. vitamin D production increases
d. sebaceous gland secretions increase
58. Secondary ossification centers are characteristic of:
a. mesenchymal ossification.
b. intramembranous ossification.
c. appositional growth.
d. endochondrial ossification.
59. Place the following steps of bone repair in the correct sequence.
1. The bone callus is remodeled and primary bone is replaced with secondary bone.
2. A hematoma fills the gap between bone fragments.
3. Osteoblasts built a new bone callus.
4. Fibroblasts and chondroblasts infiltrate the hematoma and a soft callus forms.
a. 3, 2, 4, 1
b. 3, 2, 1, 4
c. 2, 4, 3, 1
d. 2, 3, 4, 1
60. A midshaft fracture of the thigh bone involves:
a. epiphyseal plate.
b. diaphysis.
c. epiphysis.
d. articular cartilage.
61. What stimulates the release of parathyroid hormone (PTH)?
a. high blood calcium ion levels
b. high levels of vitamin D
c. low blood calcium ion levels
d. high levels of vitamin C