Ch.7 - Skeletal

Humans normally have ________ pairs of ribs.

12

The vertebral column contains ________ thoracic vertebrae.

12

Identify the typical number of vertebrae that fuse during development to form the coccyx.

3 - 5

Name the number of vertebrae that fuse together to form the sacrum.

5

The vertebral column contains ________ lumbar vertebrae.

5

The sella turcica is best described as:

A depression

What is the name of the first cervical vertebra?

Atlas

Identify the articulation site that allows us to rotate our head, e.g. shaking the head "no".

Atlas - axis

What is the name of the second cervical vertebra?

Axis

Identify the tailbone.

Coccyx

Identify the location of the sphenoid bone.

Floor of the skull

Which of the following foramen convey a branch of the trigeminal nerve (CN V)?

Foramen rotundum

Which of the following bones is unpaired?

Frontal

Identify the region of the coxal bone that articulates with the sacrum.

Ilium

Which bone is NOT considered to be part of the cranium?

Lacrimal bone

Identify the region of the sphenoid bone that contains the optic canal.

Lesser wings

Which of the following bones do not contain a sinus?

Nasal

Identify the articulation site that allows us to nod our head "yes".

Occipital bone - atlas

Identify the region of the skull that articulates with the atlas.

Occipital condyles

Identify the bony posterior wall of the pelvis.

Sacrum

Identify the suture found between the 2 parietal bones.

Sagittal suture

Identify the region of the sphenoid bone in contact with the pituitary gland.

Sella turcica

Which cranial bone spans the width of the cranial floor?

Sphenoid

The orbital rim is strong, composed of thick, protective bone. But the very thin medial wall and floor of the orbit were literally blown out by the intact eyeball itself when the boxer was struck with such a forceful blow. Which bones compose the orbital rim?

The maxilla and zygomatic bone both articulate with the frontal bone to form the orbital rim.

Surrounding the orbits are the four paranasal sinuses. What are these structures?

The paranasal sinuses are air-filled chambers lined with mucus-producing epithelium that open into the nasal cavities.

The sphenoid bone contains a sinus.

The sphenoid bone contains a sinus.

Which of the following are not components of the skeletal system? a) tendons b) bones c) other tissues that connect bones d) cartilage e) ligaments

a) tendons

The primary spinal curves

accommodate the thoracic and abdominopelvic viscera.

Which of the following is a function of the axial skeleton? a) provides an attachment for muscles that move the head, neck, and trunk b) provides protection for the brain and spinal cord c) provides an attachment for muscles that move the appendicular skeleton d) provides an attachment for muscles involved in respiration e) All of the answers are correct.

all answers are correct?

The occipital condyles of the skull articulate with the

atlas

The four spinal curves include all but one of the following. Identify the exception.

axial

The dens process is found on the

axis

Which spinal curve develops as the infant learns to support the head?

cervical

When fontanelles close prematurely, the skull shape becomes distorted. This condition is known as craniostenosis. If the anterior fontanelle closes prematurely, which of the following sutures is most likely involved?

coronal suture

The nasal conchae

create turbulence in the nasal passageways.

Which of following is a function of the skeletal system? a) calcium homeostasis b) protection of internal organs c) body support d) blood cell production e) All of the answers are correct

e) all of the answers are correct

The cranial sutures begin to form at about what age?

five

The ________ bone is unusual because it doesn't contact another bone.

hyoid

What foramen allows passage of the internal jugular veins?

jugular foramen

The parietal bones and occipital bone articulate at the ________ suture.

lambdoid

The superior part of the sternum is called the

manubrium

Sinusitis, an inflammation of the paranasal sinuses, is brought on by a viral, bacterial, or fungal infection. The most commonly affected paranasal sinuses are the most inferior ones, which are called __________.

maxillary sinuses

The foramen magnum is found in the ________ bone.

occipital

The axial skeleton provides an extensive surface area for the attachment of muscles that __________. a)move the head b)position the appendicular skeleton c)perform respiration d)perform all of these functions

perform all of these functions

While skateboarding, a young person suffered a fracture of the nose that resulted in a deviated septum. Which of the following bones or bone markings is most likely attended to during corrective surgery following this accident?

perpendicular plate of the ethmoid

Which structure does the sella turcica support?

pituitary gland

The two spinal curves present at birth are called __________ curves.

primary

The true ribs are

ribs 1-7 and are called verterbrosternal ribs.

An exaggerated lateral curvature is termed

scoliosis

The hyoid bone is suspended by ________ ligaments.

stylohyoid

What organ is located in the lacrimal fossa?

tear gland

The internal acoustic meatus is located in which bone?

temporal

The young boxer has sustained a "blowout" fracture of his left orbital complex. The orbit that contains the eye is formed by seven facial bones. Which skull bone forms the roof of the orbit?

the frontal bone

The ribs articulate with the

thoracic vertebrae

The distinguishing feature of a cervical vertebra is the

transverse foramen.

The inferior portion of the nasal septum is formed by the

vomer