Question 1

Which of the following best describes the process of endochondral ossification?

Accepted Answer

Bone replaces a pre-existing hyaline cartilage model through a series of developmental steps.

Question 2

A patient presents with a greenstick fracture. Which of the following best describes this type of fracture?

Accepted Answer

The bone bends and cracks, but does not break all the way through, commonly seen in children.

Question 3

Which hormone increases blood calcium levels by stimulating osteoclast activity?

Accepted Answer

Parathyroid hormone (PTH)

Question 4

During bone growth, which zone of the epiphyseal plate is responsible for rapid cell division and proliferation?

Accepted Answer

Zone of proliferating cartilage

Question 5

Which of the following is a function of osteoblasts?

Accepted Answer

Synthesizing and secreting the organic components of bone matrix

Question 6

Which equation correctly represents the relationship between blood calcium levels and parathyroid hormone (PTH) secretion?

Accepted Answer

$PTH \uparrow \implies [Ca^{2+}]_{blood} \uparrow$

Question 7

Which of the following best explains Wolff's Law?

Accepted Answer

Bone adapts its structure to the mechanical stresses placed upon it.

Question 8

A 25-year-old athlete experiences a spiral fracture. What is the most likely cause of this type of fracture?

Accepted Answer

Twisting force applied to the bone, causing it to break in a spiral pattern.

Question 9

Which of the following steps occurs first during bone repair after a fracture?

Accepted Answer

Formation of a hematoma at the fracture site

Question 10

Which of the following is an organic component of bone tissue?

Accepted Answer

Collagen fibers

Question 11

Which process is responsible for the lengthwise growth of long bones during childhood and adolescence?

Accepted Answer

Interstitial growth at the epiphyseal plate

Question 12

Which of the following best describes the role of calcitonin in bone remodeling?

Accepted Answer

Inhibits osteoclast activity, promoting bone deposition

Question 13

A patient with osteoporosis is likely to have an imbalance in which of the following cell activities?

Accepted Answer

Increased osteoclast activity compared to osteoblast activity

Question 14

Which of the following is NOT a function of bone?

Accepted Answer

Regulation of blood glucose levels

Question 15

Which equation best represents the relationship between bone mass ($BM$) and mechanical stress ($S$) according to Wolff's Law?

Accepted Answer

$BM \propto S$

Question 16

Which of the following best describes the difference between periosteum and endosteum?

Accepted Answer

Periosteum covers the outer surface of bones, while endosteum lines the medullary cavity.

Question 17

Which of the following is a characteristic of compact bone?

Accepted Answer

Composed of osteons (Haversian systems) arranged in concentric lamellae

Question 18

Which step in bone repair involves the replacement of the fibrocartilaginous callus with new bone?

Accepted Answer

Formation of bony callus

Question 19

Which of the following best explains the effect of estrogen on bone growth?

Accepted Answer

Promotes closure of the epiphyseal plate, ending longitudinal bone growth

Question 20

Which of the following is a real-life example of bone remodeling in response to physical stress?

Accepted Answer

Development of increased bone density in the dominant arm of a tennis player

Bones and Skeletal Tissues: Structure, Function, Growth, and Repair Learning Objectives

Study Guide - Practice Questions