$$\text{Osteoblast~activity} = \text{Osteoclast~activity}$$

Question 1

Which of the following best explains the difference between the two bone samples shown in the scanning electron micrographs above?

Accepted Answer

The lower image shows a bone with osteoporosis, characterized by larger pores and reduced bone mass compared to the normal bone in the upper image.

Question 2

Osteoporosis is primarily caused by an imbalance in the activity of which two types of bone cells?

Accepted Answer

Osteoclasts and osteoblasts

Question 3

A patient presents with brittle bones, hunched posture, and frequent hip fractures. Which of the following is the most likely diagnosis?

Accepted Answer

Osteoporosis

Question 4

Which of the following treatments directly stimulates osteoblast activity to increase bone density in osteoporosis patients?

Accepted Answer

Teriparatide

Question 5

Which of the following is NOT a recommended prevention strategy for osteoporosis?

Accepted Answer

Avoiding all physical activity to prevent bone stress

Question 6

A compound fracture is best described as:

Accepted Answer

A bone break where broken bone ends or shards puncture the skin.

Question 7

During the repair of a broken bone, which cell type is responsible for removing dead bone fragments and blood cells from the hematoma?

Accepted Answer

Osteoclasts

Question 8

Which of the following best describes the role of fibroblasts during bone healing?

Accepted Answer

They become chondroblasts and produce a callus between broken bone ends.

Question 9

A patient with osteoporosis is prescribed a medication that inhibits osteoclast activity. What is the expected effect of this medication?

Accepted Answer

Decreased bone resorption and increased bone density

Question 10

Which of the following equations best represents the balance required for healthy bone maintenance?

Accepted Answer

$$	ext{Osteoblast~activity} = 	ext{Osteoclast~activity}$$

Question 11

Which of the following symptoms is LEAST likely to be associated with osteoporosis?

Accepted Answer

Increased bone mass

Question 12

Which of the following best describes the initial event after a bone is broken?

Accepted Answer

Formation of a hematoma due to bleeding

Question 13

Which hormone's decline after menopause is most closely associated with increased risk of osteoporosis in women?

Accepted Answer

Estrogen

Question 14

A patient with a broken bone is found to have a hard, raised ring at the site of the break several days after injury. What is this structure called?

Accepted Answer

Callus

Question 15

Which of the following is a direct effect of weight-bearing exercise on bone health?

Accepted Answer

It stimulates osteoblast activity, promoting bone formation.

Pathology of the Skeletal System: Osteoporosis and Bone Injuries

Study Guide - Practice Questions