Q: Which equation best represents the total number of bones in the adult human skull?

$8 \text{ (cranial)} + 14 \text{ (facial)} = 22 \text{ bones}$

Question 1

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

Accepted Answer

Maxilla

Question 2

The axial skeleton consists of all the following EXCEPT:

Accepted Answer

Pelvic girdle

Question 3

How many bones form the adult human skull?

Accepted Answer

$22$

Question 4

Which bone forms the posterior base of the cranial cavity and contains the foramen magnum?

Accepted Answer

Occipital

Question 5

The parietal bones are best described as:

Accepted Answer

Forming the upper lateral sides and roof of the skull

Question 6

Which bone is called the 'keystone' of the cranial floor because it articulates with all other cranial bones?

Accepted Answer

Sphenoid

Question 7

A patient suffers a fracture to the bone that forms the lower lateral sides of the skull and houses the structures of the ear. Which bone is affected?

Accepted Answer

Temporal

Question 8

Which of the following is TRUE regarding the maxilla?

Accepted Answer

It forms the upper jaw and part of the hard palate

Question 9

The ethmoid bone is unique because it:

Accepted Answer

Is a single, midline bone that forms part of the nasal cavity and the orbit

Question 10

Which feature of the skull is dominated by the bony orbit and the nasal opening when viewed from the anterior?

Accepted Answer

The anterior view

Question 11

A newborn's skull contains fontanelles, which are:

Accepted Answer

Soft spots between cranial bones that allow for growth

Question 12

Which of the following bones is paired in the adult human skull?

Accepted Answer

Parietal

Question 13

The foramen magnum is a critical anatomical feature because it:

Accepted Answer

Allows passage of the spinal cord from the brain

Question 14

Which bone forms the single, forehead region of the skull?

Accepted Answer

Frontal

Question 15

The nasal bones are best described as:

Accepted Answer

Small, paired bones that form the bridge of the nose

Question 16

Which of the following is a function of the facial bones?

Accepted Answer

Forming the upper and lower jaws

Question 17

If a patient has damage to the sphenoid bone, which of the following symptoms might they experience?

Accepted Answer

Vision problems due to its proximity to the optic canal

Question 18

Which equation best represents the total number of bones in the adult human skull?

Accepted Answer

$8 	ext{ (cranial)} + 14 	ext{ (facial)} = 22 	ext{ bones}$

Question 19

Which of the following best describes the role of the thoracic cage?

Accepted Answer

Protects the heart and lungs and supports breathing

Question 20

A trauma patient presents with a fracture to the bone that forms the anterior base of the cranial cavity and part of the nasal septum. Which bone is most likely fractured?

Accepted Answer

Ethmoid

Study Notes: The Axial Skeleton (Skeletal System II)

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