Question 1

Which of the following best describes the structure and function of the bone tissue shown in the first image (cross-section of a flat bone in the skull)?

Accepted Answer

It consists of a layer of spongy bone sandwiched between two layers of compact bone, providing both strength and lightness.

Question 2

A patient suffers a fracture in the shaft of their femur. Which part of the long bone is most likely affected?

Accepted Answer

Diaphysis

Question 3

Which bone marking is correctly matched with its description and function?

Accepted Answer

Condyle – a rounded articular projection that helps form joints

Question 4

Which of the following statements about the microscopic anatomy of compact bone is correct?

Accepted Answer

Lacunae are cavities in the bone matrix that house osteocytes.

Question 5

During bone remodeling, which cells are responsible for breaking down bone matrix and releasing calcium into the blood?

Accepted Answer

Osteoclasts

Question 6

A child is diagnosed with a greenstick fracture. Which of the following best explains why this type of fracture is more common in children than adults?

Accepted Answer

Children's bones are more flexible due to a higher proportion of organic matrix.

Question 7

Which hormone is released when blood calcium levels are low, and what is its effect on bone tissue?

Accepted Answer

Parathyroid hormone (PTH); activates osteoclasts to break down bone

Question 8

Which of the following best describes the process of ossification in long bones during development?

Accepted Answer

Bone replaces hyaline cartilage models, beginning at the diaphysis and spreading toward the epiphyses.

Question 9

Which of the following bone markings would most likely serve as a passageway for nerves and blood vessels?

Accepted Answer

Foramen

Question 10

A patient presents with a comminuted fracture. Based on the provided materials, which of the following best describes this fracture?

Accepted Answer

Bone breaks into three or more fragments, common in older adults.

Question 11

Which of the following is a function of the paranasal sinuses?

Accepted Answer

They lighten the skull and amplify sounds as we speak.

Question 12

Which bone is unique in that it does not articulate with any other bone and serves as a movable base for the tongue?

Accepted Answer

Hyoid bone

Question 13

Which of the following best describes the difference between primary and secondary spinal curvatures?

Accepted Answer

Primary curvatures are present from birth and form a C-shape; secondary curvatures develop after birth and form an S-shape.

Question 14

Which of the following joints is classified as a synovial, multiaxial joint?

Accepted Answer

Shoulder joint

Question 15

A patient has a fracture at the lateral malleolus. Which bone is affected?

Accepted Answer

Fibula

Question 16

Which of the following best explains why the epiphyseal plate is important during childhood and adolescence?

Accepted Answer

It is the site of interstitial growth, allowing bones to increase in length.

Question 17

Which of the following bone markings is a depression that often serves as an articular surface?

Accepted Answer

Fossa

Question 18

Which of the following is a distinguishing feature of synovial joints?

Accepted Answer

They have a joint cavity filled with synovial fluid.

Question 19

A patient presents with osteoporosis. Which of the following best describes the condition?

Accepted Answer

Decreased bone mass and increased fragility due to bone resorption outpacing bone formation.

Question 20

Which of the following best describes the role of the periosteum in bone structure and function?

Accepted Answer

It covers the outer surface of bone, contains blood vessels and nerves, and is essential for bone growth and repair.

The Skeletal System: Structure, Classification, and Bone Markings

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