Anatomy Quiz Flashcards
What term is used to describe a structures position as being behind another?
Posterior
What is the name of the pigment in the human body?
Melanin
What is the name of the cell that produces collagen fibres in connective tissue?
Fibroblast
What is the junction between two neurones called?
Synapse
What is the function of valves in veins?
Prevent back flow of blood
Which division of autonomic nervous system is considered fright or flight?
Sympathetic
Which division of which cranial nerve provides sensory innervation to the cornea?
Ophthalmic division of CN5
What is the thickness of central and peripheral corneal?
Central; 0.5mm
Peripheral; 0.7mm
What is the function of the zonular occlusions in the corneal epithelium and endothelium?
Prevents passage of liquid between vessels
Where does the anterior surface of the cornea receive nutrients from i) day ii) night
I) tear film
II) conjunctival vessels
List three layers of the sclera from outermost to innermost
Episclera
Storma
Lamina Fusca
What is he sclera thickness at the posterior pole?
Roughly 1.00mm
Why is the sclera normally white in appearance?
Random arrangement of collagen scattering all wavelengths of light
What structure fills the posterior scleral foramen?
Lamina cribrosa
Approximately how many short posterior ciliary arteries enter the sclera to form the circle of Haller-Zinn?
Approx. 20