CH 6

Question 1

which cells have a ruffled border and secrete hydrochloric acid?

Answer 1

osteoclasts

Question 2

the medullary cavity of a child’s bone may contain..

Answer 2

red bone marrow

Question 3

the long bones of the limbs grow in length by cell proliferation and hypertrophy in…

Answer 3

the metaphysis

Question 4

osteoclasts are most closely related by common descent to

Answer 4

monocytes

Question 5

the walls between cartilage lacunae break down in the zone of

Answer 5

bone deposition

Question 6

what promotes bone deposition?

Answer 6

dietary calcium, vitamin D, calcitonin, and testosterone

Question 7

a child jumps to the ground from the top of a playground “jungle gym”. His leg bones do not shatter mainly because they contain..

Answer 7

collagen fibers

Question 8

one long bone meets another at its..

Answer 8

epiphysis

Question 9

Calcitriol is made from

Answer 9

7-dehydrocholesterol

Question 10

One sign of Osteoporosis is..

Answer 10

kyphosis

Question 11

Calcium phosphate crystalizes in bone as a mineral called ___

Answer 11

hydroxyapatite

Question 12

Osteocytes contact each other through channels called __, in the bone matrix

Answer 12

canaliculi

Question 13

A bone increases in diameter only by ___ growth, the addition of new surface lamellae

Answer 13

appositional

Question 14

Most compact bone is organized in cylindrical units called ___, composed of lamellae encircling a central canal

Answer 14

osteons

Question 15

The ___ glands secrete a hormone that stimulates cells to resorb bone and return its minerals to the blood

Answer 15

parathyroid

Question 16

The ends of a bone are covered with a layer of hyaline cartilage called the ___

Answer 16

articular cartilage

Question 17

The cells that deposit new bone matrix are called ___

Answer 17

osteoblasts

Question 18

the most common bone disease is ___

Answer 18

osteoporosis

Question 19

The transitional region between epiphyseal cartilage and the primary marrow cavity of a young bone is called the ___

Answer 19

metaphysis

Question 20

The cranial bones develop from a flat sheet of condensed messenchyme in a process called ___

Answer 20

intramembranous ossification