Question 1

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

Accepted Answer

Synthesis of neurotransmitters

Question 2

A patient presents with a fracture in the shaft of their femur. Which anatomical term best describes the location of this fracture?

Accepted Answer

Diaphysis

Question 3

Which type of bone is primarily responsible for resisting compression and torsion forces?

Accepted Answer

Compact bone

Question 4

Which bone cell type is responsible for bone resorption, and what is the main mechanism by which it accomplishes this?

Accepted Answer

Osteoclasts; by secreting hydrogen ions and enzymes

Question 5

Which of the following best describes the composition of the inorganic matrix of bone?

Accepted Answer

Mainly hydroxyapatite crystals containing calcium and phosphorus

Question 6

A 10-year-old child has a higher proportion of red bone marrow compared to an adult. What is the primary function of red bone marrow?

Accepted Answer

Blood cell formation (hematopoiesis)

Question 7

Which of the following equations correctly represents the chemical formula for hydroxyapatite, the main mineral in bone?

Accepted Answer

$$Ca_5$$($$PO_4)_3OH$

Question 8

Which structure in a long bone is responsible for housing blood vessels and nerves, and is composed of dense irregular collagenous connective tissue?

Accepted Answer

Periosteum

Question 9

A patient with osteoporosis has increased activity of which bone cell type, leading to excessive bone matrix breakdown?

Accepted Answer

Osteoclasts

Question 10

Which of the following best describes the arrangement of lamellae in compact bone?

Accepted Answer

Concentric rings around a central canal

Question 11

Which class of bone is the patella an example of, and what is its unique feature?

Accepted Answer

Sesamoid bone; located within tendons

Question 12

Which of the following statements about bone marrow is TRUE?

Accepted Answer

Red bone marrow is the site of hematopoiesis

Question 13

Which of the following best explains why compact bone is also called lamellar bone?

Accepted Answer

It is composed of concentric layers called lamellae

Question 14

Which bone cell type is most active in bone deposition, and what is its primary function?

Accepted Answer

Osteoblasts; secreting organic matrix and assisting in mineralization

Question 15

Which of the following best describes the function of trabeculae in spongy bone?

Accepted Answer

They provide a protective structure for bone marrow and resist forces from multiple directions

Question 16

Which of the following is a correct match between bone structure and its description?

Accepted Answer

Medullary cavity – hollow cavity containing marrow

Question 17

Which of the following ions is NOT a major component of the inorganic matrix of bone?

Accepted Answer

Iron

Question 18

Which of the following best describes the role of collagen fibers in bone tissue?

Accepted Answer

They provide flexibility and align with hydroxyapatite crystals to enhance bone hardness

Question 19

Which of the following structures allows for the connection of blood vessels and nerves between neighboring osteons in compact bone?

Accepted Answer

Perforating canal

Question 20

A patient has a bone tumor affecting the periosteum. Which of the following consequences is most likely to occur?

Accepted Answer

Reduced blood supply to the compact bone

Introduction to Bones as Organs: Structure, Classification, and Function

Study Guide - Practice Questions