Question 1

Which of the following best describes a sesamoid bone, and which is the most common example in the human body?

Accepted Answer

A bone that forms within a tendon; the patella is the most common example.

Question 2

A patient presents with a fracture in a long bone. Which of the following best describes the healing process, including the correct order of events?

Accepted Answer

Hematoma formation $$\rightarrow$$ fibrocartilaginous callus formation $$\rightarrow$$ bony callus formation $$\rightarrow$$ bone remodeling

Question 3

Which of the following is NOT a function of osteoclasts?

Accepted Answer

Producing new bone matrix

Question 4

Which of the following bones is classified as an irregular bone?

Accepted Answer

Vertebra

Question 5

A patient has a herniated disc compressing the spinal cord. Which structure is most likely affected?

Accepted Answer

Intervertebral disc

Question 6

Which of the following statements about the periosteum is TRUE?

Accepted Answer

It is a dense connective tissue membrane covering the outer surface of bones, except at joint surfaces.

Question 7

Which of the following joints is an example of a hinge joint, and what movement does it primarily allow?

Accepted Answer

Elbow joint; flexion and extension

Question 8

Which of the following best describes the difference between compact bone and spongy bone?

Accepted Answer

Compact bone is dense and forms the outer layer of bones, while spongy bone is porous and found at the ends of long bones and inside flat bones.

Question 9

Which of the following is a characteristic of synovial joints?

Accepted Answer

They have a joint cavity filled with synovial fluid.

Question 10

Which bone is part of the axial skeleton?

Accepted Answer

Sternum

Question 11

A patient has difficulty moving their arm in a circular motion at the shoulder. Which type of joint is most likely affected?

Accepted Answer

Ball and socket joint

Question 12

Which of the following bones contains a cribriform plate and is involved in the sense of smell?

Accepted Answer

Ethmoid bone

Question 13

Which of the following is TRUE regarding the vertebral column?

Accepted Answer

The cervical region contains 7 vertebrae, the thoracic region contains 12, and the lumbar region contains 5.

Question 14

Which of the following best describes the function of yellow bone marrow?

Accepted Answer

It stores fat and serves as an energy reserve.

Question 15

Which of the following is a distinguishing feature of the thoracic vertebrae?

Accepted Answer

They have facets for rib articulation.

Question 16

Which of the following bones is NOT part of the skull?

Accepted Answer

Scapula

Question 17

A patient is diagnosed with osteoporosis. Which of the following best explains the underlying cellular mechanism?

Accepted Answer

Osteoclast activity exceeds osteoblast activity, leading to bone resorption.

Question 18

Which of the following is TRUE about the epiphyseal plate?

Accepted Answer

It is a region of hyaline cartilage where bone growth occurs in children.

Question 19

Which of the following best describes the difference between a fibrous joint and a cartilaginous joint?

Accepted Answer

A fibrous joint is joined by dense connective tissue and is generally immovable, while a cartilaginous joint is joined by cartilage and allows limited movement.

Question 20

Which of the following is a function of the foramen magnum?

Accepted Answer

It allows passage of the spinal cord from the brain to the vertebral canal.

Skeletal System: Structure, Function, and Key Concepts

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