#1
Which bone is considered the keystone of the cranial floor?
Frontal bone
Temporal bone
Sphenoid bone
Occipital bone
#2
What is the shape of the sphenoid bone?
Triangular
Rectangular
Circular
Irregular
#3
Which of the following is NOT a part of the sphenoid bone?
Greater wing
Lesser wing
External occipital protuberance
Pterygoid process
#4
What is the primary function of the sphenoid bone in the skull?
Supports the mandible
Protects the brain
Facilitates speech production
Provides attachment for neck muscles
#5
Which sinus is not located within the sphenoid bone?
Sphenoid sinus
Maxillary sinus
Frontal sinus
Ethmoidal sinus
#6
Which important structure passes through the sphenoid bone?
Optic nerve
Facial nerve
Vagus nerve
Trigeminal nerve
#7
In which cranial fossa is the sphenoid bone located?
Anterior cranial fossa
Middle cranial fossa
Posterior cranial fossa
Temporal cranial fossa
#8
Which part of the sphenoid bone houses the pituitary gland?
Greater wing
Lesser wing
Body
Sella turcica
#9
Which bone articulates with the sphenoid bone at the pterygoid process?
Maxilla
Zygomatic bone
Mandible
Temporal bone
#10
Which structure within the sphenoid bone allows communication between the nasal cavity and the nasopharynx?
Foramen ovale
Foramen spinosum
Foramen lacerum
Sphenoid sinus ostium
#11
What is the role of the pterygoid plates in the sphenoid bone?
Facilitate vision
Anchor the skull to the spine
Serve as attachment sites for muscles
Protect the brain
#12
Which cranial nerve is associated with the foramen spinosum in the sphenoid bone?
Facial nerve
Trigeminal nerve (V2)
Abducent nerve
Glossopharyngeal nerve
#13
What is the name of the butterfly-shaped plate in the sphenoid bone?
Coronal suture
Sagittal suture
Ethmoidal plate
Sella turcica
#14
What is the significance of the foramen rotundum in the sphenoid bone?
Passage for the trigeminal nerve (V2)
Passage for the facial nerve
Passage for the optic nerve
Passage for the vagus nerve
#15
What is the function of the sphenoid sinus in the sphenoid bone?
Resonance for voice production
Production of cerebrospinal fluid
Storage of olfactory receptors
Facilitation of vision
#16
Which artery passes through the foramen lacerum near the sphenoid bone?
Internal carotid artery
Vertebral artery
Facial artery
Middle meningeal artery
#17
Which nerve traverses the foramen ovale in the sphenoid bone?
Trigeminal nerve (V3)
Facial nerve
Vagus nerve
Hypoglossal nerve
#18
What is the role of the greater wing of the sphenoid bone?
Protects the brainstem
Forms part of the eye socket
Supports the nasal cavity
Encloses the pituitary gland
#19
What is the primary purpose of the lesser wing of the sphenoid bone?
Protects the optic nerve
Forms part of the eye socket
Supports the temporal lobe
Encloses the pituitary gland