chapter 6: bone growth

Question 1

___ stop growing at adolescence. The __ and __ continue growing.

Answer 1

long
nose and jaw

Question 2

What is interstitial growth?

Answer 2

longitudinal growth

Question 3

What happpens during interstitial/longitudinal growth?

Answer 3

“old” cartilage calcifies, invaded by ______________ → bone

Question 4

When does the epiphyseal plate close?

what is closure inflenced by?

Answer 4

18-21

gowth hormones, thyroid hormones, sex hormones.

Question 5

What is appositional growth?

Answer 5

widening of bones

Question 6

What do osetoblasts do during appositional growth?

Answer 6

Make new osteons along outer surface of diaphysis but under the periosteum.

Making walls thicker

Question 7

What do osteoclasts do during appositional growth?

Answer 7

Dissolve inner layers, making a wider cavity.

Question 8

What hormones control bone growth pre-puberty

Answer 8

human growth hormone (hGH) from ___ ___.

Question 9

What hormones control bone growth during/post-puberty?

Answer 9

ovaries: _____
testes:_____

Question 10

These compounds have play roles in bone remodeling.

Answer 10

MgOH, phosphorous, Vit. ABCD, and hormones.

The distal part of the femur is fully replaced every 5-6 months.