Question 1

Which of the following is NOT a function of the axial skeleton?

Accepted Answer

It produces red blood cells through hematopoiesis.

Question 2

A patient presents with difficulty in speech resonance and increased weight of the skull. Which structure is most likely affected?

Accepted Answer

Paranasal sinuses

Question 3

Which suture separates the occipital bone from the parietal bones and may contain Wormian (sutural) bones?

Accepted Answer

Lambdoid suture

Question 4

A newborn is delivered with a large, flexible skull and a prominent 'soft spot' at the intersection of the frontal, sagittal, and coronal sutures. This area is known as the:

Accepted Answer

Anterior fontanelle

Question 5

Which bone contains the sella turcica, a saddle-shaped enclosure that houses the pituitary gland?

Accepted Answer

Sphenoid

Question 6

A patient suffers a fracture at the foramen magnum. Which of the following structures is most likely to be affected?

Accepted Answer

The connection between the cranial cavity and vertebral canal

Question 7

Which of the following statements about the vertebral column is CORRECT?

Accepted Answer

The thoracic and sacral curves are primary curves present during fetal development.

Question 8

A trauma patient presents with a whiplash injury. Which vertebral region is most likely involved?

Accepted Answer

Cervical vertebrae

Question 9

Which of the following is a distinguishing feature of lumbar vertebrae compared to thoracic vertebrae?

Accepted Answer

They have thick, oval-shaped bodies and lack costal facets.

Question 10

A patient has a fracture at the auricular surface of the sacrum. Which joint is most likely affected?

Accepted Answer

Sacro-iliac joint

Question 11

Which of the following bones does NOT contribute to the formation of the orbit?

Accepted Answer

Vomer

Question 12

A patient is unable to move their lower jaw properly due to a dislocation. Which structure is most likely involved?

Accepted Answer

Mandibular fossa of the temporal bone

Question 13

Which of the following ribs are classified as 'floating ribs'?

Accepted Answer

Ribs 11 and 12

Question 14

Which bone contains the cribriform plate, which allows passage of olfactory nerves?

Accepted Answer

Ethmoid

Question 15

A patient has a congenital defect resulting in incomplete fusion of the sternal body. At what age is the sternal body normally expected to be fully fused?

Accepted Answer

At least age 25

Question 16

Which of the following best describes the function of the inferior nasal conchae?

Accepted Answer

They slow and create turbulence in inhaled air, increasing epithelial surface area to warm and humidify air.

Question 17

A patient presents with a fracture at the mental foramen. Which nerve is most likely affected?

Accepted Answer

Sensory nerve of the lips and chin

Question 18

Which of the following is TRUE regarding the development of the sacrum?

Accepted Answer

It consists of five fused sacral vertebrae, with fusion occurring between puberty and ages 25–30.

Question 19

Which of the following formulas correctly represents the total number of bones in the adult axial skeleton?

Accepted Answer

$$8 + 14 + 6 + 1 + 24 + 1 + 1 + 24 + 1 = 80$$

Question 20

A patient has a lesion affecting the ligamentum nuchae. Which vertebra does this ligament extend from and to?

Accepted Answer

From C7 to the skull

The Axial Skeleton: Structure, Function, and Key Features

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