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BIOA201 > bone remodelling > Flashcards

bone remodelling Flashcards

1
Q

what is collagens function?

A

resists tension, gives small bit of slack so bones aren’t brittle

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2
Q

what is calciums function?

A

resists compression, bone is strong and solid

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3
Q

what are the 3 kinds of cells in bone?

A

osteocytes, osteoblasts, osteoclasts

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4
Q

what are osteocytes?

A

mature osteoblasts/ bone cells

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5
Q

what are osteoclasts?

A

destroy ECM

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6
Q

what are osteoblasts?

A

produce bone

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7
Q

what are the 6 main layers of bone?

A

periosteum, endosteum, outer lamellae, osteon lamellae, central canaliculi

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8
Q

what is and what is the function of an osteon?

A

a series of cylinders of lamella running longitudinally down shaft, maintains osteocytes by providing nutrients

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9
Q

what travels through the central canal?

A

blood vessels and nerves

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10
Q

what are canaliculi?

A

channels for osteocytes through ECM

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11
Q

what are lacunae?

A

lakes for osteocytes

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12
Q

in only what kind of bone can osteons be found in?

A

compact

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13
Q

where are osteocytes found in cancellous bone?

A

housed in lacunae on the surfaces of trabeculae

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14
Q

what is the periosteum?

A

outer layer on compact bone of a long bone

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15
Q

what is the endosteum?

A

inner layer on compact bone of a long bone shaft

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16
Q

what is a cartilage model?

A

all bone starts as cartilage before ossification

17
Q

what is the primary ossification centre of a long bone?

A

diaphysis

18
Q

what are the secondary ossification centres of long bones?

A

epiphyses

19
Q

what prevents fusion of epiphyses and diaphysis?

A

growth/epiphyseal plate

20
Q

why does the growth/epiphyseal plate prevent fusion?

A

prevents contact between diaphysis and epiphyses until diaphysis is fully grown then it will ossify, becoming bone to fuse the bone together signifying the end of growth

21
Q

is epiphyseal fusion earlier in males or females?

A

females

BIOA201 (7 decks)

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