Question 1

Which of the following is NOT a major function of the skeletal system?

Accepted Answer

Production of hormones

Question 2

Which bone cell type is responsible for breaking down bone matrix during bone remodeling?

Accepted Answer

Osteoclast

Question 3

A patient suffers a fracture in the femur. Which type of bone development is primarily responsible for the initial formation of the femur during embryonic growth?

Accepted Answer

Endochondral ossification

Question 4

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

Accepted Answer

It is composed of osteons with concentric lamellae surrounding a central canal.

Question 5

During intramembranous ossification, which event occurs FIRST?

Accepted Answer

Mesenchymal cells cluster together and differentiate into osteoblasts.

Question 6

Which equation best represents the mineralization of bone matrix during ossification?

Accepted Answer

$$Ca^{2+}$$ + $$PO_4$$^{3-} \rightarrow $$Ca_3$$($$PO_4)_2$

Question 7

A child’s X-ray shows a visible epiphyseal plate in the femur. What does this indicate about the child’s bone growth?

Accepted Answer

The bone is still growing in length through endochondral ossification.

Question 8

Which of the following is a correct comparison between compact and spongy bone?

Accepted Answer

Compact bone contains osteons, while spongy bone contains trabeculae.

Question 9

Which cell type is most likely to be found trapped within lacunae in mature bone tissue?

Accepted Answer

Osteocyte

Question 10

A patient with osteoporosis is prescribed weight-bearing exercise. How does this activity physiologically improve bone health?

Accepted Answer

It stimulates osteoblast activity, increasing bone formation.

Question 11

Which of the following bones is formed primarily by intramembranous ossification?

Accepted Answer

Parietal bone of the skull

Question 12

Which of the following is the correct sequence of events in endochondral ossification?

Accepted Answer

Cartilage model forms, chondrocytes die, osteoblasts replace cartilage with bone.

Question 13

Which of the following best explains why bone is considered a dynamic tissue?

Accepted Answer

Bone is constantly remodeled by the coordinated actions of osteoblasts and osteoclasts.

Question 14

A patient with a vitamin D deficiency is likely to have impaired bone mineralization. Which formula represents the process affected?

Accepted Answer

$$Ca^{2+}$$ + $$PO_4$$^{3-} \rightarrow $$Ca_3$$($$PO_4)_2$

Question 15

Which of the following is a functional significance of flat bones such as the scapula?

Accepted Answer

They provide broad surfaces for muscle attachment.

Question 16

Which of the following best describes the role of osteoprogenitor cells?

Accepted Answer

They are stem cells that differentiate into osteoblasts.

Question 17

A patient’s X-ray shows a fracture that has not healed after several weeks. Which cell type is most likely deficient, leading to poor bone repair?

Accepted Answer

Osteoblasts

Question 18

Which of the following is a correct statement about the composition of bone matrix?

Accepted Answer

It consists of organic osteoid and inorganic hydroxyapatite.

Question 19

Which of the following bones is part of the axial skeleton?

Accepted Answer

Vertebrae

Question 20

A patient presents with a bone tumor that disrupts the normal structure of osteons. Which type of bone tissue is most affected?

Accepted Answer

Compact bone

Bone Tissue and Development: Structure, Function, and Growth

Guida di studio - Domande di pratica

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