Question 1

Which of the following best describes the primary difference between osteomalacia and osteoporosis?

Accepted Answer

Osteomalacia is due to poor mineralization of bone, while osteoporosis is due to increased bone resorption with normal mineralization.

Question 2

A 7-year-old child presents with bowed legs and enlarged epiphyseal plates. Which disorder is most likely responsible for these symptoms?

Accepted Answer

Rickets

Question 3

Which of the following is a common risk factor for osteoporosis in postmenopausal women?

Accepted Answer

Decreased estrogen levels

Question 4

Paget’s disease is characterized by which of the following bone changes?

Accepted Answer

Excessive and haphazard bone deposit and resorption

Question 5

A patient with osteoporosis is at increased risk for which type of fracture, as shown in the provided images?

Accepted Answer

Compression fracture

Question 6

Which of the following best explains why rickets is more severe in children than osteomalacia is in adults?

Accepted Answer

Children’s bones are still growing rapidly, so poor mineralization leads to more pronounced deformities.

Question 7

Which of the following is NOT a typical risk factor for osteoporosis?

Accepted Answer

High levels of physical activity

Question 8

A patient’s X-ray reveals irregular bone thickening and a high ratio of spongy to compact bone in the pelvis. Which disease is most likely present?

Accepted Answer

Paget’s disease

Question 9

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

Accepted Answer

Hematoma formation, fibrocartilaginous callus formation, bony callus formation, bone remodeling

Question 10

Which fracture type is most commonly seen in children due to their relatively flexible bones?

Accepted Answer

Greenstick fracture

Question 11

A 65-year-old woman fractures her hip after a minor fall. Her bone density scan shows decreased bone mass but normal bone matrix composition. Which disorder is most likely?

Accepted Answer

Osteoporosis

Question 12

Which of the following treatments is most likely to be effective in Paget’s disease?

Accepted Answer

Bisphosphonates and high doses of calcitonin

Question 13

Which of the following equations best represents the relationship between bone mass ($$M$$), bone deposition rate ($$D$$), and bone resorption rate ($$R) $$over time?

Accepted Answer

$$\Delta M = D - R$$

Question 14

A patient with a history of chronic steroid use presents with fragile bones. Which mechanism best explains this finding?

Accepted Answer

Steroids increase bone resorption and decrease bone formation.

Question 15

Which of the following statements about osteoid in osteomalacia is correct?

Accepted Answer

Osteoid is produced, but calcium salts are not adequately deposited.

Question 16

Which of the following best explains why weight-bearing exercise is recommended to prevent osteoporosis?

Accepted Answer

It stimulates bone deposition by increasing mechanical stress on bones.

Question 17

A comminuted fracture is most likely to occur in which population and why?

Accepted Answer

Older adults, because their bones are more brittle due to decreased bone mass.

Question 18

Which of the following is a plausible reason why Paget’s disease is rarely seen before age 40?

Accepted Answer

It is a slowly progressing disorder that typically manifests later in life.

Question 19

Which of the following best describes the effect of decreased sex hormones on bone health?

Accepted Answer

Decreased sex hormones reduce inhibition of osteoclasts, leading to increased bone resorption.

Question 20

A patient presents with pain when weight is put on their bones, but X-rays show no deformities. Laboratory tests reveal low vitamin D. Which disorder is most likely?

Accepted Answer

Osteomalacia

Bone Disorders and Fractures: Pathology, Risk Factors, and Healing

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