WEEK 10: CHROID AND BLOOD SUPPLY Flashcards
Which artery is the primary blood supply to the globe and adnexa?
A. choroid
B. cavernous sinus
C. external branch of the carotid artery
D. ophthalmic artery
D. ophthalmic artery
Which of the following is NOT a function of the choroid?
A. reflect incident light back into the photoreceptors
B. adjust the position of the retina by changing its thickness
C. facilitate heat exchange to and from the retina
D. blood supply of the macula
A. reflect incident light back into the photoreceptors
Which one of the following is not a pathway for vascular drainage from the choroid?
A. anterior ciliary vein
B. vortex vein
C. superior retinal vein
D. posterior ciliary artery
C. superior retinal vein
The main innervation of the choroid includes the following EXCEPT:
A. short ciliary nerves
B. long ciliary nerves
C. Cranial Nerve VII
D. Cranial Nerve III
C. Cranial Nerve VII
The dorsonasal artery
A. supplies the conjunctiva and sclera
B. supplies the anterior sphenoid sinus, frontal and nasal cavity and skin of the nose
C. supplies the skin and muscles of the forehead and scalp
D. sends blood vessels to supply the lacrimal sac and the nose
Cilio-retinal arteries are
A. branch off from the short posterior ciliary arteries
B. present in 90% of the population
C. runs in a ring around the optic nerve head
D. are an additional branch from the central retinal artery
A. branch off from the short posterior ciliary arteries
Short posterior ciliary arteries
A. are additional arteries that may save central vision even during central retinal artery occlusions.
B. pierce the sclera in a ring around the optic nerve and supply the choroidal stroma. These branches anastomose to form the Circle of Zinn-Haller.
C. run between the sclear and the choroid towards the anterior globe to supply the ciliary body.
D. carry deoxygenated blood out of the eye.
B. pierce the sclera in a ring around the optic nerve and supply the choroidal stroma. These branches anastomose to form the Circle of Zinn-Haller.
