Q: Which of the following equations best represents the composition of the bone matrix?

$$\text{Bone Matrix} = \frac{2}{3} \text{Calcium Phosphate} + \frac{1}{3} \text{Collagen Fibers}$$

Question 1

Which of the following best describes the functional significance of the trabeculae in spongy bone?

Accepted Answer

They allow spongy bone to withstand stress from multiple directions and reduce bone weight.

Question 2

A patient presents with a fracture that has broken through the skin. Which type of fracture is this, and what is a major risk associated with it?

Accepted Answer

Open (compound) fracture; risk of infection

Question 3

Which hormone increases blood calcium levels by stimulating osteoclast activity, increasing intestinal absorption, and decreasing renal excretion of calcium?

Accepted Answer

Parathyroid hormone (PTH)

Question 4

During endochondral ossification, what is the primary event that occurs at the primary ossification center?

Accepted Answer

Chondrocytes enlarge, the matrix calcifies, and chondrocytes die.

Question 5

Which of the following bone cells is responsible for bone resorption and the release of stored minerals?

Accepted Answer

Osteoclast

Question 6

A 16-year-old athlete suffers a fracture at the epiphyseal plate. What is a possible long-term consequence if the fracture is not properly treated?

Accepted Answer

The bone may stop growing in length, resulting in a shorter limb.

Question 7

Which of the following best explains why weight-bearing exercise is recommended for maintaining bone health?

Accepted Answer

Exercise stimulates osteoblast activity, increasing bone density and strength.

Question 8

Which of the following equations best represents the composition of the bone matrix?

Accepted Answer

$$	ext{Bone Matrix} = \frac{2}{3} 	ext{Calcium Phosphate} + \frac{1}{3} 	ext{Collagen Fibers}$$

Question 9

A patient with vitamin D deficiency is most likely to develop which of the following conditions?

Accepted Answer

Rickets

Question 10

Which of the following statements about bone remodeling is correct?

Accepted Answer

Bone remodeling is a continuous process that allows bones to adapt to stress and repair microdamage.

Question 11

Which of the following best describes the difference between compact and spongy bone?

Accepted Answer

Compact bone is organized into osteons, while spongy bone is organized into trabeculae.

Question 12

Which of the following is a function of the periosteum?

Accepted Answer

It isolates bone from surrounding tissues, provides a route for blood vessels and nerves, and participates in bone growth and repair.

Question 13

Which of the following best explains why osteoporosis is more common in postmenopausal women?

Accepted Answer

Decreased estrogen levels lead to increased osteoclast activity and bone resorption.

Question 14

Which of the following bone markings is correctly matched with its function?

Accepted Answer

Sinus – chamber within a bone, normally filled with air

Question 15

A patient with excessive cartilage formation at the epiphyseal plates resulting in tall stature and long, slender limbs is most likely to have which condition?

Accepted Answer

Marfan syndrome

Question 16

Which of the following best describes appositional growth in bones?

Accepted Answer

Growth in width by addition of new bone at the outer surface

Question 17

Which of the following nutrients is essential for collagen synthesis and osteoblast differentiation?

Accepted Answer

Vitamin C

Question 18

Which of the following is the correct sequence of events in fracture repair?

Accepted Answer

Fracture hematoma formation → Callus formation → Spongy bone formation → Compact bone formation

Question 19

Which of the following best describes the role of osteocytes in bone tissue?

Accepted Answer

They are mature bone cells that maintain the protein and mineral content of the matrix.

Bones and Bone Structure: Study Guide for Anatomy & Physiology

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