Bone

Question 0

where do osteoclasts increase the size of the medullary cavity

Answer 0

at the endosteal surface

Question 1

The type of bone that’s replaced in a greater percentage throughout the year

Answer 1

spongy

Question 2

vitamins that are required for normal bone growth

Answer 2

DACK

Question 3

5 hormones required for normal bone growth

Answer 3

insulin, GH, thyroid, estrogen, testosterone

Question 4

what is the first structure to form in a fracture

Answer 4

hematoma

Question 5

what is the initial “soft callus” made of?

Answer 5

fibrocartilage produced by the chondrocytes from progenitor cells of the periosteum

Question 6

how long does the “soft callus” take to form?

Answer 6

3 weeks

Question 7

what is a hard callus made of

Answer 7

spongy bone

Question 8

how long does it take to form a hard callus

Answer 8

3-4 months

Question 9

What is secreted when calcium levels are too low

Answer 9

parathyroid hormone

Question 10

which two systems of the body respond to increase the blood calcium level

Answer 10

the GI and the kidneys

Question 11

what molecule is activated by PTH to return Ca levels to normal

Answer 11

Vitamin D

Question 12

Where is calcitonin produced/excreted

Answer 12

parafollicular cells of the thyroid gland

Question 13

when does osteogenesis begin during development

Answer 13

6th week of gestation

Question 14

arteries of a long bone

Answer 14

diaphyseal, periosteal, epiphyseal, metaphyseal

Question 15

2 functions of spongy bone

Answer 15

1. resists stress 2. houses red marrow

Question 16

osteocytes of spongy bone are found in what 2 structures

Answer 16

lacunae, canaliculi