Mastering A&P Chapter 7 - The Skeleton

Identify the region of the sphenoid bone in contact with the pituitary gland. Sella turcica Cribriform plate Lesser wings Greater wings

Sella turcica The sella turcica is a central depression that houses the pituitary gland.

Which bone is NOT considered to be part of the cranium? Sphenoid bone Lacrimal bone Ethmoid bone Occipital bone

Lacrimal bone The lacrimal bone is a tiny bone found in the medial portion of the orbit. It is a facial bone, not part of the cranium.

All of the bones of the skull, except the mandible, are united by sutures and are therefore immovable. True or False

True

Costal cartilages join most ribs to the sternum. True or False

True

The sella turcica is best described as: An elevation A projection A depression A hole

A depression The sella turcica is a depression in the central region of the sphenoid bone. It houses the pituitary gland.

Which of the following bones is unpaired? Temporal Zygomatic Parietal Frontal

Frontal There is only one frontal bone. It forms the anterior portion of the cranium (the forehead region).

The hyoid bone is unique because it ________.

is the only bone of the body that does not articulate with any other bone

Which of the following is not a function of the skeletal system? a. blood cell formation b. calcium storage c. movement d. all of the above are functions of the skeletal system*

D. all of the above are functions of the skeletal system*

The membranous areas between the cranial bones of the fetal skull are called ________. a. Areolas b. foramina c. sutures d. fontanelles

D. fontanelles

The frontal bone articulate with the parietal bone by means of the sagittal suture. True or False

False (Coronal Suture)

Lordosis affects the thoracic vertebrae. True or False

False

Which of the following foramen convey a branch of the trigeminal nerve (CN V)? Foramen rotundum Foramen spinosum Foramen lacerum Optic foramen

Foramen rotundum The foramen rotundum and the foramen ovale serve as passageways for branches of the trigeminal nerve

Identify the region of the sphenoid bone that contains the optic canal. Cribriform plate Sella turcica Lesser wings Greater wings

Lesser wings The optic canals are passageways found in the lesser wings. They serve as a passageway for the optic nerve running from the eyeball to the optic chiasma.

Which of the following bones do not contain a sinus? Maxillary Nasal Sphenoid Frontal

Nasal The sinuses found in the skull are collectively known as the paranasal sinuses because they encircle the nasal cavity. The nasal bones are small tombstone shaped bones that form the bridge of the nose and don't contain sinuses.

Identify the suture found between the 2 parietal bones. Coronal suture Lamdoidal suture Sagittal suture Squamosal suture

Sagittal suture The parietal bones meet at midline on the top of the skull, forming the sagittal suture which runs along the midsagittal plane.

Which cranial bone spans the width of the cranial floor? Temporal Sphenoid Occipital Ethmoid

The sphenoid bone is the large bat shaped bone that spans the floor of the skull. The sphenoid bone contains two cavities known as the sphenoidal sinuses.

Identify the location of the sphenoid bone. Lateral walls of the nasal cavity Floor of the skull Face Anterior portion of the cranium

The sphenoid bone spans the width of the floor of the skull.

In the anatomical position, the lateral forearm bone is the radius. True or False

True

The largest and strongest bone of the face is the maxilla. True or False

True

The sphenoid bone contains a sinus. True or False

True The sphenoid bone contains the paired sphenoidal sinuses.