Question 1

Which of the following statements best describes the role of the perichondrium in cartilage structure and function?

Accepted Answer

It is a dense irregular connective tissue that surrounds cartilage, resists outward expansion, and contains blood vessels to nourish cartilage cells.

Question 2

A patient presents with a fracture in the shaft of their femur. Which anatomical term best describes this region of the bone?

Accepted Answer

Diaphysis

Question 3

Which bone cell type is primarily responsible for bone resorption during remodeling, and what mechanism does it use?

Accepted Answer

Osteoclasts; they secrete acids and lysosomal enzymes to dissolve bone minerals and digest organic matrix.

Question 4

During endochondral ossification, what is the correct sequence of events leading to the formation of the primary ossification center?

Accepted Answer

Chondrocytes hypertrophy, cartilage matrix calcifies, periosteal bud invades, osteoblasts form spongy bone.

Question 5

Which equation correctly represents the relationship between calcium ion concentration and bone remodeling, as regulated by parathyroid hormone (PTH)?

Accepted Answer

If $$[Ca$$^{2+}$$]$$ decreases, then $$PTH$$ increases, leading to increased osteoclast activity and bone resorption.

Question 6

A child with bowed legs and deformed pelvis is diagnosed with rickets. Which deficiency is most likely responsible for this condition?

Accepted Answer

Insufficient vitamin D or calcium, leading to poor bone mineralization.

Question 7

According to Wolff’s law, which scenario best illustrates the effect of mechanical stress on bone remodeling?

Accepted Answer

A tennis player’s dominant arm develops thicker bone compared to the non-dominant arm due to repeated mechanical stress.

Question 8

Which of the following best describes the difference between intramembranous and endochondral ossification?

Accepted Answer

Intramembranous ossification forms bone from fibrous connective tissue membranes, while endochondral ossification forms bone by replacing hyaline cartilage.

Question 9

Which bone disease is characterized by excessive and haphazard bone deposits and resorption, resulting in weakened and spotty bones?

Accepted Answer

Paget’s disease

Question 10

A patient with osteoporosis is at increased risk for fractures. Which factor most contributes to this risk?

Accepted Answer

Bone resorption outpaces bone deposition, leading to decreased bone mass and fragile bones.

Question 11

Which of the following is NOT a function of bone tissue?

Accepted Answer

Production of hormones for metabolism

Question 12

Which bone cell type is mitotically active and found in the periosteum and endosteum, giving rise to most other bone cells?

Accepted Answer

Osteoprogenitor cells

Question 13

During bone fracture repair, which stage involves the formation of a fibrocartilaginous callus that acts as a bone splint?

Accepted Answer

Stage 2: Formation of a fibrocartilaginous callus

Question 14

Which equation best represents the mineralization process during bone deposition?

Accepted Answer

When $$[Ca$$^{2+}$$]$$ and $$[PO_4$^{3-}]$$ concentrations are high, hydroxyapatite crystals form: $$Ca^{2+}$$ + $$PO_4$$^{3-} \rightarrow Ca_{10}($$PO_4)_6(OH)_2$

Question 15

Which bone shape classification includes the vertebrae and hip bones?

Accepted Answer

Irregular bones

Question 16

Which of the following best explains why cartilage is replaced by bone during embryonic development rather than being converted into bone?

Accepted Answer

Cartilage provides flexibility for growth and movement, and bone formation requires a rigid structure for support.

Question 17

Which of the following is a plausible consequence of overactivity of the parathyroid gland?

Accepted Answer

Weakened bones due to excessive bone resorption and elevated blood calcium levels.

Question 18

Which bone marking category is primarily associated with sites of muscle and ligament attachment?

Accepted Answer

Projections

Question 19

A fracture classified as 'open compound' is best described as:

Accepted Answer

A fracture where bone ends penetrate the skin.

Question 20

Which of the following best describes the function of osteocytes within bone tissue?

Accepted Answer

They maintain and monitor bone matrix, and communicate signals for bone remodeling to osteoblasts and osteoclasts.

Bones and the Skeletal System: Structure, Function, and Development

Study Guide - Practice Questions

Study Guide - Flashcards