8344390
Questão 1
Questão
Bone tissue is static.
Responda
- True
- False
Questão 2
Questão
Bone is made of the basic tissue known as [blank_start]connective[blank_end] tissue. There are two extracellular components: [blank_start]organic and inorganic[blank_end].
The [blank_start]organic[blank_end] component (1/3 of ECM) is mainly [blank_start]collagen[blank_end] fibres to resist [blank_start]tension[blank_end], in a base of proteoglycans which hold water volume.
The [blank_start]inorganic[blank_end] component (2/3 of ECM) is what makes bone hard. It contains [blank_start]hydroxyapatite[blank_end], which resists [blank_start]compression[blank_end].
Responda
-
connective
-
organic and inorganic
-
organic
-
collagen
-
tension
-
inorganic
-
hydroxyapatite
-
compression
Questão 3
Questão
Which statement about the cellular components of bone is FALSE?
Responda
-
Osteoblasts destroy bone.
-
Osteoblasts become osteocytes.
-
Osteoclasts break down the ECM.
Questão 4
Questão
Choose the statements about the structure of compact bone which are correct.
Responda
-
The outer layer of compact bone (the periosteum) has holes in it.
-
It is made up of osteons, which are longitudinal cylinders made of lamellae.
-
Lamellae are the tubes of ECM, with collagen fibres aligned parallel to direction of growth.
-
There are no nerves, arteries, or veins in the compact bone.
-
The osteons maintain the osteocytes by providing them with nutrition.
Questão 5
Questão
Choose the statement about osteocytes and compact bone which is CORRECT.
Responda
-
Osteons sit within lacunae.
-
Central canals bring nutrients to osteocytes.
-
Canaliculi are smaller than central canals.
Questão 6
Questão
The foramen is the opening of the central canal.
Responda
- True
- False
Questão 7
Questão
Cancellous bone is trabeculous.
Responda
- True
- False
Questão 8
Questão
The cavities between trabeculae are filled with...
Responda
-
ECM.
-
Marrow.
-
Calcium.
-
Osteons.
Questão 9
Questão
Blood cells in the marrow feed osteocytes.
Responda
- True
- False
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