Question 1

Which of the following best describes the structure and function of spongy (cancellous) bone compared to compact bone?

Accepted Answer

Spongy bone is less dense, contains trabeculae, and is primarily found at the ends of long bones and within flat bones.

Question 2

During intramembranous ossification, which type of tissue is replaced by bone?

Accepted Answer

Mesenchymal connective tissue

Question 3

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

Accepted Answer

Cartilage model forms, primary ossification center develops, bone collar forms, secondary ossification center appears.

Question 4

Which cell type is primarily responsible for bone resorption during bone remodeling?

Accepted Answer

Osteoclasts

Question 5

A patient has a genetic defect that impairs the formation of lamellar bone. Which of the following consequences is most likely?

Accepted Answer

Decreased bone strength due to less organized matrix.

Question 6

Which formula best represents the relationship between bone strength ($$S$$), inorganic matrix content ($$M$$), and collagen content ($$C$$)?

Accepted Answer

$$S \propto M$$

Question 7

Which of the following statements about the periosteum is correct?

Accepted Answer

It contains osteogenic cells that can differentiate into osteoblasts.

Question 8

In endochondral ossification, what is the role of the primary ossification center?

Accepted Answer

It is the first site where bone tissue replaces cartilage.

Question 9

Which process is most directly responsible for increasing the length of long bones during childhood?

Accepted Answer

Endochondral ossification at the epiphyseal plate

Question 10

A researcher is studying bone formation in fetal development. Which mechanism is responsible for the formation of flat bones such as those in the skull?

Accepted Answer

Intramembranous ossification

Question 11

Which of the following best explains why mature lamellar bone is stronger than woven bone?

Accepted Answer

Lamellar bone has a more organized matrix and higher inorganic content.

Question 12

During bone healing after a fracture, which sequence of cellular events is most accurate?

Accepted Answer

Osteoclasts resorb bone, chondrocytes form cartilage, osteoblasts lay down new bone.

Question 13

Which of the following is NOT a function of osteoblasts?

Accepted Answer

Bone resorption

Question 14

A child with a mutation affecting the formation of the bone collar during endochondral ossification would most likely experience which clinical outcome?

Accepted Answer

Impaired replacement of cartilage with bone in long bones

Question 15

Which equation best represents the process of bone mineralization, where hydroxyapatite ($$Ca_{10}(PO_4$)_6(OH)_2) is $$deposited in the matrix?

Accepted Answer

$$Ca^{2+}$$ + $$PO_4$$^{3-} + OH^- \rightarrow Ca_{10}($$PO_4)_6(OH)_2$

Question 16

Which of the following best describes woven bone?

Accepted Answer

It is immature bone formed rapidly during embryonic development and fracture repair.

Question 17

Which of the following is a direct result of increased inorganic matrix in bone tissue?

Accepted Answer

Increased bone rigidity and strength

Question 18

During fetal development, which event occurs first in the formation of a long bone by endochondral ossification?

Accepted Answer

Development of a cartilage model

Question 19

Which of the following best explains the role of osteogenic cells in bone development?

Accepted Answer

They differentiate into osteoblasts, which are responsible for bone formation.

Question 20

A patient with a deficiency in collagen synthesis would most likely exhibit which bone abnormality?

Accepted Answer

Bones with increased flexibility and decreased strength

Bone Structure and Ossification: Study Notes for Anatomy & Physiology

스터디 가이드 - 연습 문제

학습 가이드 - 플래시카드