Question 1

Which of the following best describes the primary function of red bone marrow in adults?

Accepted Answer

Production of blood cells through hematopoiesis

Question 2

A patient presents with brittle bones and frequent fractures. Laboratory tests reveal a deficiency in hydroxyapatite. Which component of the bone matrix is most likely affected?

Accepted Answer

Inorganic matrix

Question 3

Which equation correctly represents the chemical formula for hydroxyapatite, the main inorganic component of bone matrix?

Accepted Answer

$Ca_5(PO_4)_3OH$

Question 4

Which type of bone cell is primarily responsible for bone resorption and is derived from blood cell lineages?

Accepted Answer

Osteoclast

Question 5

A long bone is fractured and needs to be repaired. Which process is most responsible for the replacement of primary bone with secondary bone during healing?

Accepted Answer

Bone remodeling

Question 6

Which of the following best distinguishes compact bone from spongy bone?

Accepted Answer

Compact bone contains osteons, while spongy bone contains trabeculae.

Question 7

Which hormone is most potent in accelerating the closure of the epiphyseal plate during puberty?

Accepted Answer

Estrogen

Question 8

A child is diagnosed with a genetic disorder that impairs collagen synthesis. Which part of the bone matrix will be most affected?

Accepted Answer

Organic matrix (osteoid)

Question 9

Which of the following bones is classified as a sesamoid bone?

Accepted Answer

Patella

Question 10

During endochondral ossification, which tissue is replaced by bone?

Accepted Answer

Hyaline cartilage

Question 11

Which of the following best describes appositional bone growth?

Accepted Answer

Increase in bone width by addition of new bone beneath the periosteum

Question 12

A patient with osteoporosis is at increased risk for fractures due to which of the following changes in bone tissue?

Accepted Answer

Decreased bone density and weakened bone matrix

Question 13

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

Accepted Answer

Regulation of blood glucose levels

Question 14

Which process is primarily responsible for the formation of flat bones such as the skull and clavicle?

Accepted Answer

Intramembranous ossification

Question 15

Which of the following best describes the role of osteoblasts?

Accepted Answer

Build bone by secreting collagen and facilitating mineralization

Question 16

A patient has a mutation that prevents the formation of Sharpey's fibers. Which structure will be most affected?

Accepted Answer

Attachment of periosteum to bone

Question 17

Which of the following equations correctly represents the relationship between bone mass ($M$), bone density ($\rho$), and bone volume ($V$)?

Accepted Answer

$M = ho 	imes V$

Question 18

Which of the following is a distinguishing feature of secondary bone compared to primary bone?

Accepted Answer

Organized lamellae and higher mineral content

Question 19

Which of the following scenarios best illustrates the process of bone remodeling?

Accepted Answer

A runner’s tibia adapts to increased stress by thickening its cortex

Question 20

Which of the following best explains why estrogen deficiency in postmenopausal women increases the risk of osteoporosis?

Accepted Answer

Estrogen inhibits osteoclast activity, so its deficiency leads to increased bone breakdown

Bone Structure and Function: Anatomy & Physiology Study Notes

Study Guide - Practice Questions

Study Guide - Flashcards