Question 1

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

Accepted Answer

They digest and recycle bone matrix, releasing stored minerals through osteolysis.

Question 2

A patient presents with a pathologic fracture of the vertebrae. Which underlying process most likely contributed to this fracture?

Accepted Answer

A disease weakening the bone structure, such as osteoporosis or cancer.

Question 3

During endochondral ossification, what is the primary role of the periosteal bud?

Accepted Answer

It invades the central region, bringing osteoblasts, blood vessels, and other elements necessary for bone formation.

Question 4

Which hormone is responsible for stimulating osteoclast activity when blood calcium levels are low?

Accepted Answer

Parathyroid hormone (PTH)

Question 5

A long bone is fractured and undergoes repair. Which sequence correctly describes the stages of bone healing?

Accepted Answer

Hematoma formation → Fibrocartilage callus formation → Bony callus formation

Question 6

Which of the following is TRUE regarding the chemical composition of bone?

Accepted Answer

Collagen fibers provide flexibility, while hydroxyapatite crystals provide hardness.

Question 7

Which equation best represents the formation of hydroxyapatite in bone?

Accepted Answer

$$Ca_3$$($$PO_4)_2 + Ca(OH)_2$$ \rightarrow Ca_{10}($$PO_4)_6(OH)_2$

Question 8

Which of the following best explains why vitamin D is essential for bone health?

Accepted Answer

Vitamin D is required for the absorption of calcium from the small intestine.

Question 9

A child is diagnosed with a deficiency in growth hormone. Which of the following effects would most likely be observed?

Accepted Answer

Reduced chondrocyte proliferation in epiphyseal plates, resulting in stunted longitudinal bone growth.

Question 10

Which of the following statements about the axial and appendicular skeleton is correct?

Accepted Answer

The axial skeleton consists of 80 bones, including the skull, rib cage, and vertebral column.

Question 11

Which of the following best describes appositional growth in bone?

Accepted Answer

It increases the diameter of bones by adding new bone matrix to the external surface.

Question 12

Which of the following is a characteristic of hyaline cartilage?

Accepted Answer

It has an amorphous matrix with few visible fibers and provides stiff but somewhat flexible support.

Question 13

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

Accepted Answer

Production of hormones that regulate blood glucose levels.

Question 14

Which process is responsible for the conversion of the epiphyseal plate to the epiphyseal line, ending longitudinal bone growth?

Accepted Answer

Promotion of osteoblastic activity by sex hormones.

Question 15

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

Accepted Answer

They are passageways that connect lacunae to the central canal, allowing exchange of materials.

Question 16

A runner develops a stress fracture in the tibia. Which of the following best explains the cause?

Accepted Answer

A small crack in the bone caused by overuse and repetitive activity.

Question 17

Which of the following statements about bone remodeling is correct?

Accepted Answer

Osteoclasts secrete lysosomal enzymes and acids to digest bone matrix.

Question 18

Which of the following best describes the effect of calcitonin on calcium homeostasis?

Accepted Answer

It inhibits osteoclasts and promotes calcium deposition in bone.

Question 19

Which of the following is a correct description of the medullary cavity in long bones?

Accepted Answer

It is located within the shaft and stores fat as yellow bone marrow in adults.

Osseous Tissue, Bone Structure, and Connective Tissue: ANP Study Guide

Study Guide - Practice Questions