$$\frac{m_{Ca}}{M} \times 100\%$$

Question 1

Which of the following is NOT a primary function of the skeletal system?

Accepted Answer

Production of hormones

Question 2

A patient suffers a fracture to the vertebrae. Which function of the skeletal system is most directly compromised?

Accepted Answer

Protection of the spinal cord

Question 3

Which bone cell type is responsible for secreting organic components of the bone matrix during osteogenesis?

Accepted Answer

Osteoblast

Question 4

What is the main function of yellow bone marrow?

Accepted Answer

Energy reserve through lipid storage

Question 5

Which structure in compact bone allows blood vessels and nerves to pass through each osteon?

Accepted Answer

Central (Haversian) canal

Question 6

A long bone grows in length primarily due to which process?

Accepted Answer

Interstitial growth at the epiphyseal plate

Question 7

Which equation best represents the percentage of calcium in bone by mass, given total bone mass $$M$$ and calcium mass $$m_{Ca}$$?

Accepted Answer

$$\frac{m_{Ca}}{M} 	imes 100\%$$

Question 8

Which hormone increases intestinal absorption of calcium and is activated by the kidneys?

Accepted Answer

Calcitriol (active form of Vitamin D)

Question 9

During fracture healing, what is the correct sequence of events?

Accepted Answer

Fracture hematoma forms, internal and external callus develop, cartilage of external callus is replaced by bone, bone is remodeled

Question 10

Which of the following best describes the role of Sharpey fibers?

Accepted Answer

They anchor tendons and ligaments to bone by penetrating the periosteum

Question 11

A weightlifter experiences increased bone density over time. Which mechanism best explains this adaptation?

Accepted Answer

Bone remodeling in response to mechanical stress

Question 12

Which of the following is a correct description of spongy bone?

Accepted Answer

Contains trabeculae and is the site of red marrow for blood cell formation

Question 13

Which process is responsible for the conversion of hyaline cartilage to bone during fetal development?

Accepted Answer

Endochondral ossification

Question 14

If a patient has a deficiency in Vitamin D, which of the following is most likely to occur?

Accepted Answer

Decreased intestinal absorption of calcium

Question 15

Which equation describes the relationship between bone strength ($$S$$), mineral deposition ($$D$$), and bone resorption ($$R$$)?

Accepted Answer

$$S = D - R$$

Question 16

Which layer lines the medullary cavity and is active in bone growth, repair, and remodeling?

Accepted Answer

Endosteum

Question 17

Which bone cell type is responsible for removing and recycling bone matrix?

Accepted Answer

Osteoclast

Question 18

A child is diagnosed with a growth plate injury. Which zone of the epiphyseal cartilage is most likely affected?

Accepted Answer

Zone of proliferation

Question 19

Which of the following best explains why astronauts experience bone loss during extended space missions?

Accepted Answer

Reduced mechanical stress leads to decreased bone deposition

Question 20

Which of the following is a correct statement about the periosteum?

Accepted Answer

It provides routes for circulatory and nervous supply and participates in bone growth and repair

Osseous Tissue & Bone Structure: Functions and Classification

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