Skeletal System: Bones of the Axial Skeleton Quiz
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Questions and Answers

What are the organic components of bone?

Osteoprogenitor, osteoblasts, osteocytes, and osteoclasts

What is the composition of the bone matrix?

25% water, 25% organic components, and 50% crystallized mineral salts

What is the function of osteoclasts in bone?

Osteoclasts resorb (break down) the bone matrix.

What causes the closure of epiphyseal plates in bones?

<p>The cessation of cartilage cell division and the replacement of cartilage by bone.</p> Signup and view all the answers

What role does mechanical stress play in bone remodeling?

<p>It is required for normal bone remodeling and is detected by osteocytes.</p> Signup and view all the answers

What are the four classes of bones determined by shape?

<p>Long bones, short bones, flat bones, irregular bones</p> Signup and view all the answers

What are the general functions of bones?

<p>Support and protection of soft tissues, levers for movement, hematopoiesis, storage of mineral and energy reserves</p> Signup and view all the answers

What is the composition of the medullary cavity?

<p>Marrow cavity</p> Signup and view all the answers

Where is the articular cartilage located and what is its function?

<p>It is located at the ends of long bones and it acts as a shock absorber and reduces friction.</p> Signup and view all the answers

What is the main difference between compact (cortical) bone and spongy (cancellous) bone?

<p>Compact bone is solid and hard, making up the shaft of long bones and the external layer of all bones, while spongy bone is located internal to compact bone and appears porous.</p> Signup and view all the answers

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