Question 1

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

Accepted Answer

They resorb bone by secreting hydrochloric acid and lysosomal enzymes.

Question 2

A patient presents with a bone fracture where the bone is crushed into many pieces, commonly seen in osteoporotic bones after a fall. What type of fracture is this?

Accepted Answer

Compression fracture

Question 3

Which of the following equations correctly represents the percentage of organic and inorganic components in bone matrix?

Accepted Answer

$$35\%$$ organic, $$65\%$$ inorganic$

Question 4

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

Accepted Answer

Cartilage model forms, bone collar develops, primary ossification center forms, secondary ossification centers appear, epiphyses ossify

Question 5

Which hormone is primarily responsible for stimulating the epiphyseal plates during childhood growth?

Accepted Answer

Growth hormone

Question 6

A child presents with bowed legs and X-rays show poorly mineralized bones. Which disorder is most likely?

Accepted Answer

Rickets

Question 7

Which of the following bone markings is correctly matched with its function?

Accepted Answer

Spine – raised area for muscle or ligament attachment

Question 8

Which of the following best explains why spongy bone is found in the epiphyses of long bones?

Accepted Answer

It is arranged to resist stress from multiple directions and houses red marrow.

Question 9

A 60-year-old woman is diagnosed with osteoporosis. Which of the following best describes the underlying mechanism?

Accepted Answer

Bone resorption outpaces bone deposition.

Question 10

Which of the following is a correct description of appositional growth in bones?

Accepted Answer

Growth in width due to osteoblasts adding bone tissue to the external surface

Question 11

Which of the following best describes the role of osteocytes in bone tissue?

Accepted Answer

They maintain the health of the bone matrix.

Question 12

A patient suffers a fracture where the bone breaks incompletely, with one side of the shaft breaking and the other side bending. This is most likely a:

Accepted Answer

Greenstick fracture

Question 13

Which of the following is the correct sequence for the healing of a bone fracture?

Accepted Answer

Hematoma forms, fibrocartilaginous callus forms, bony callus forms, bone remodeling occurs

Question 14

Which of the following best explains why compact bone is replaced every 10 years, while cancellous bone is replaced every 3–4 years?

Accepted Answer

Compact bone is less vascularized and experiences less metabolic activity.

Question 15

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

Accepted Answer

It is a membrane that covers the external surface of bones except at joint surfaces.

Question 16

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

Accepted Answer

Bone forms directly from mesenchyme without a cartilage model.

Question 17

Which of the following is a function of osteocalcin secreted by osteoblasts?

Accepted Answer

It regulates energy metabolism.

Question 18

A patient with a pituitary tumor that decreases growth hormone secretion during childhood would most likely present with which of the following?

Accepted Answer

Short stature due to reduced epiphyseal plate activity

Question 19

Which of the following best explains why the epiphyseal plate is critical for bone growth in children and adolescents?

Accepted Answer

It is the region where cartilage is rapidly produced and replaced by bone, allowing for longitudinal growth.

The Skeletal System: Structure, Function, and Development

Study Guide - Practice Questions

Study Guide - Flashcards