RAD 105 EXAM STUDY GUIDE 2025 QUESTIONS AND
ANSWERS RATED A+
✔✔what sinus is the largest - ✔✔maxillary
✔✔what sinus develops last - ✔✔ethmoid
✔✔the mandible angle is called - ✔✔gonion
✔✔what is the largest immovable bone in the face - ✔✔maxilla
✔✔this suture separates the two parietal bones in the midline - ✔✔sagittal
✔✔what houses the organs of hearing and equilibrium - ✔✔petrous portion
✔✔pyramid shaped portion is the thickest and densest bone of the cranium -
✔✔petrous portion
✔✔widest portion of the entire skull - ✔✔Parietal tubercles (eminences)
✔✔the ethmoid notch is located on what bone - ✔✔frontal
✔✔the floor base of the skull consist of - ✔✔sphenoid, ethmoid and R/L temporal
✔✔the calvarium skull cap consist of - ✔✔frontal, occipital, and R/L parietal
✔✔this bone is centrally located and forms the anchor for all cranial bones -
✔✔sphenoid
✔✔form anterior portion of the roof of the mouth known as the hard bony palate -
✔✔palatine process
✔✔centrally located forms the anchor for all eight cranial bones - ✔✔sphenoid bone
✔✔smooth raised prominence between the eyebrows and important radiographic
positioning landmark - ✔✔glabella
✔✔the sutures (joints) of the adult cranium - ✔✔coronal
sagittal
lambdoidal
squamosal
✔✔the junctions of the adult cranium - ✔✔bregma
, lambda
pterion (R/L)
asterions (R/L)
✔✔what cranium suture separates the two parietal bones from occipital bone. The back
suture - ✔✔lambdoidal suture
✔✔what cranium suture separates the parietal bones from their respective temporal
bones. the side suture - ✔✔squamosal suture
✔✔what cranium junction is the anterior end of the sagittal suture - ✔✔bregma junction
✔✔the anterior fontanel does not completely close until what age - ✔✔18 months age
✔✔what fontanel is largest at birth - ✔✔anterior fontanel
✔✔the temporal bones are divided into 3 primary portions - ✔✔squamous
mastoid
petrous
✔✔the occipital bone articulates with 6 bones - ✔✔2 parietal bones
sphenoid
2 temporal bones
atlas (C1)
✔✔petrous portion means - ✔✔rock
✔✔what projects superiorly from the cribriform plate through the ethmoidal notch -
✔✔crista galli
✔✔the ethmoid notch is located on what bone - ✔✔frontal
✔✔what do the atlas depressions articulate with - ✔✔occipital condyles
✔✔what are the 4 sinuses - ✔✔frontal
ethmoid
sphenoid
maxillary
✔✔what make up the rim or circular base of each orbit - ✔✔frontal bone
maxilla bone
zygoma
✔✔what 3 cranial bones help form each orbital cavity - ✔✔frontal
ANSWERS RATED A+
✔✔what sinus is the largest - ✔✔maxillary
✔✔what sinus develops last - ✔✔ethmoid
✔✔the mandible angle is called - ✔✔gonion
✔✔what is the largest immovable bone in the face - ✔✔maxilla
✔✔this suture separates the two parietal bones in the midline - ✔✔sagittal
✔✔what houses the organs of hearing and equilibrium - ✔✔petrous portion
✔✔pyramid shaped portion is the thickest and densest bone of the cranium -
✔✔petrous portion
✔✔widest portion of the entire skull - ✔✔Parietal tubercles (eminences)
✔✔the ethmoid notch is located on what bone - ✔✔frontal
✔✔the floor base of the skull consist of - ✔✔sphenoid, ethmoid and R/L temporal
✔✔the calvarium skull cap consist of - ✔✔frontal, occipital, and R/L parietal
✔✔this bone is centrally located and forms the anchor for all cranial bones -
✔✔sphenoid
✔✔form anterior portion of the roof of the mouth known as the hard bony palate -
✔✔palatine process
✔✔centrally located forms the anchor for all eight cranial bones - ✔✔sphenoid bone
✔✔smooth raised prominence between the eyebrows and important radiographic
positioning landmark - ✔✔glabella
✔✔the sutures (joints) of the adult cranium - ✔✔coronal
sagittal
lambdoidal
squamosal
✔✔the junctions of the adult cranium - ✔✔bregma
, lambda
pterion (R/L)
asterions (R/L)
✔✔what cranium suture separates the two parietal bones from occipital bone. The back
suture - ✔✔lambdoidal suture
✔✔what cranium suture separates the parietal bones from their respective temporal
bones. the side suture - ✔✔squamosal suture
✔✔what cranium junction is the anterior end of the sagittal suture - ✔✔bregma junction
✔✔the anterior fontanel does not completely close until what age - ✔✔18 months age
✔✔what fontanel is largest at birth - ✔✔anterior fontanel
✔✔the temporal bones are divided into 3 primary portions - ✔✔squamous
mastoid
petrous
✔✔the occipital bone articulates with 6 bones - ✔✔2 parietal bones
sphenoid
2 temporal bones
atlas (C1)
✔✔petrous portion means - ✔✔rock
✔✔what projects superiorly from the cribriform plate through the ethmoidal notch -
✔✔crista galli
✔✔the ethmoid notch is located on what bone - ✔✔frontal
✔✔what do the atlas depressions articulate with - ✔✔occipital condyles
✔✔what are the 4 sinuses - ✔✔frontal
ethmoid
sphenoid
maxillary
✔✔what make up the rim or circular base of each orbit - ✔✔frontal bone
maxilla bone
zygoma
✔✔what 3 cranial bones help form each orbital cavity - ✔✔frontal
