Question 1

Which of the following best describes the primary function of the skeletal system?

Accepted Answer

Support, protection, movement, mineral storage, and blood cell production

Question 2

Bones are classified by shape. Which of the following is an example of a flat bone?

Accepted Answer

Scapula

Question 3

Which statement correctly describes the gross structure of a long bone?

Accepted Answer

Long bones have a central cavity called the medullary cavity, surrounded by compact bone and covered by periosteum.

Question 4

What is the main difference between red and yellow bone marrow?

Accepted Answer

Red marrow produces blood cells, while yellow marrow stores fat.

Question 5

Which of the following is an inorganic component of the extracellular matrix of bone tissue?

Accepted Answer

Hydroxyapatite (calcium phosphate crystals)

Question 6

Which cell type is responsible for bone resorption?

Accepted Answer

Osteoclasts

Question 7

Which of the following best describes the microscopic structure of compact bone?

Accepted Answer

It contains osteons (Haversian systems) with concentric lamellae surrounding a central canal.

Question 8

Which process describes the formation of bone from a cartilage model?

Accepted Answer

Endochondral ossification

Question 9

During bone formation, which of the following is true about primary and secondary bone?

Accepted Answer

Primary bone is laid down first and is later replaced by secondary bone, which is stronger and more organized.

Question 10

Which hormone is most directly responsible for increasing blood calcium levels by stimulating bone resorption?

Accepted Answer

Parathyroid hormone (PTH)

Question 11

A patient with a vitamin D deficiency is likely to experience which of the following effects on bone remodeling?

Accepted Answer

Decreased calcium absorption, leading to impaired bone mineralization

Question 12

Which equation best represents the relationship between bone length growth and the rate of chondrocyte proliferation at the epiphyseal plate?

Accepted Answer

$L = k 	imes r_{chondrocyte}$

Question 13

Which of the following best describes the process of bone repair after a fracture?

Accepted Answer

Formation of a hematoma, followed by a fibrocartilaginous callus, then bony callus, and finally bone remodeling

Question 14

Which dietary factor is most important for proper bone remodeling?

Accepted Answer

Adequate calcium and vitamin D intake

Question 15

Which of the following is a correct sequence for endochondral ossification?

Accepted Answer

Osteoblasts form bone collar, cartilage calcifies, periosteal bud invades, spongy bone forms

Question 16

Which hormone is primarily responsible for inhibiting osteoclast activity and lowering blood calcium levels?

Accepted Answer

Calcitonin

Question 17

A child is diagnosed with rickets, a disease characterized by soft bones. Which process is most directly impaired?

Accepted Answer

Endochondral ossification due to vitamin D deficiency

Question 18

Which of the following best explains the role of osteocytes in bone tissue?

Accepted Answer

Osteocytes maintain bone tissue and communicate mechanical stress to other bone cells.

Question 19

Which process allows bones to increase in diameter during growth?

Accepted Answer

Appositional growth

Question 20

Which of the following equations best represents the effect of parathyroid hormone (PTH) on blood calcium concentration ($[Ca^{2+}]$)?

Accepted Answer

$[Ca^{2+}]_{blood} = [Ca^{2+}]_{initial} + \Delta Ca^{2+}_{bone~resorption}$

Study Guide: Bone Structure, Growth, and Remodeling (Chapter 6)

Study Guide - Practice Questions