Question 1

Which of the following best describes the primary function of osteoclasts in bone tissue?

Accepted Answer

They break down bone ECM by secreting hydrogen ions and enzymes.

Question 2

A patient is diagnosed with osteopetrosis, a condition where osteoclasts are defective. Which of the following symptoms would most likely be observed?

Accepted Answer

Increased bone mass with weak and brittle bones.

Question 3

Which structure in compact bone contains blood vessels and nerves and is lined by endosteum?

Accepted Answer

Central (Haversian) canal

Question 4

During intramembranous ossification, what is the correct sequence of events?

Accepted Answer

Mesenchymal cells differentiate into osteogenic cells → Osteoblasts develop in the primary ossification center → Osteoblasts secrete organic matrix → Osteocytes become trapped in lacunae

Question 5

Which of the following best explains why compact bone is able to resist twisting and bending forces?

Accepted Answer

Collagen fibers in adjacent lamellae run in opposite directions.

Question 6

A researcher is studying the process of bone resorption. Which of the following chemical reactions is most relevant to this process?

Accepted Answer

$$\mathrm{Ca}_3(\mathrm{PO}_4)_2 \rightarrow 3\mathrm{Ca}^{2+} + 2\mathrm{PO}_4$$^{3-}$$

Question 7

Which of the following is TRUE regarding the difference between primary (woven) bone and secondary (lamellar) bone?

Accepted Answer

Secondary bone has organized, parallel collagen bundles and is stronger than primary bone.

Question 8

Which of the following best describes the role of canaliculi in compact bone?

Accepted Answer

They connect lacunae and allow osteocytes to communicate via gap junctions.

Question 9

A mutation prevents the formation of the periosteum during bone development. Which of the following processes would be most directly affected?

Accepted Answer

The deposition of early compact bone during intramembranous ossification.

Question 10

Which of the following statements about spongy bone is correct?

Accepted Answer

It is organized into trabeculae that provide a framework for bone marrow.

Question 11

Which of the following best explains why osteocytes are critical for bone maintenance?

Accepted Answer

They secrete chemicals to maintain the extracellular matrix and recruit osteoblasts to build bone under tension.

Question 12

Which of the following is a distinguishing feature of osteoclasts compared to other bone cells?

Accepted Answer

They are large, multinucleated cells with ruffled borders.

Question 13

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

Accepted Answer

Bone forms on a model of hyaline cartilage, with the outer compact bone forming first.

Question 14

Which of the following is the correct sequence of events during the early stages of endochondral ossification?

Accepted Answer

Chondroblasts in the perichondrium differentiate into osteoblasts → Osteoblasts build the bone collar → Internal cartilage calcifies and chondrocytes die

Question 15

Which of the following is a function of the perforating (Volkmann) canals in compact bone?

Accepted Answer

They connect central canals of neighboring osteons and carry blood vessels from the periosteum.

Question 16

A newborn is diagnosed with a condition where the fontanels of the skull fail to close. Which process is most likely disrupted?

Accepted Answer

Fusion of primary ossification centers during intramembranous ossification.

Question 17

Which of the following best describes the role of osteogenic cells in bone tissue?

Accepted Answer

They differentiate into osteoblasts, which then build bone.

Question 18

Which of the following is a key difference between compact and spongy bone?

Accepted Answer

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

Bone Cells, Histology, and Ossification: Study Notes for ANP College Students

Study Guide - Practice Questions

Study Guide - Flashcards