Anatomy Quiz Flashcards

1
Q

What term is used to describe a structures position as being behind another?

A

Posterior

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2
Q

What is the name of the pigment in the human body?

A

Melanin

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3
Q

What is the name of the cell that produces collagen fibres in connective tissue?

A

Fibroblast

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4
Q

What is the junction between two neurones called?

A

Synapse

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5
Q

What is the function of valves in veins?

A

Prevent back flow of blood

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6
Q

Which division of autonomic nervous system is considered fright or flight?

A

Sympathetic

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7
Q

Which division of which cranial nerve provides sensory innervation to the cornea?

A

Ophthalmic division of CN5

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8
Q

What is the thickness of central and peripheral corneal?

A

Central; 0.5mm
Peripheral; 0.7mm

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9
Q

What is the function of the zonular occlusions in the corneal epithelium and endothelium?

A

Prevents passage of liquid between vessels

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10
Q

Where does the anterior surface of the cornea receive nutrients from i) day ii) night

A

I) tear film
II) conjunctival vessels

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11
Q

List three layers of the sclera from outermost to innermost

A

Episclera
Storma
Lamina Fusca

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12
Q

What is he sclera thickness at the posterior pole?

A

Roughly 1.00mm

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13
Q

Why is the sclera normally white in appearance?

A

Random arrangement of collagen scattering all wavelengths of light

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14
Q

What structure fills the posterior scleral foramen?

A

Lamina cribrosa

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15
Q

Approximately how many short posterior ciliary arteries enter the sclera to form the circle of Haller-Zinn?

A

Approx. 20

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16
Q

What nervous system controls pupil constriction?

A

Parasympathetic

17
Q

What is the dense flat area of pigment on the anterior boarder layer of the iris called?

A

Naevus

18
Q

The spiralled blood vessels of the iris are derived from what structure?

A

Major arterial circle

19
Q

What are the approximate thicknesses of the iris at i) the root ii) the collarette

A

I) 0.1mm
II) 0.6mm

20
Q

What is the technical name for pupil constriction?

A

Miosis

21
Q

What is the name of the dense network of blood vessels in the ciliary body?

A

Ciliary plexus

22
Q

When accommodation occurs, does the ciliary body move forwards and in, or backwards and out?

A

Forwards and in

23
Q

Which cells in the ciliary body secrete aqueous humour?

A

Unpigmented cells
Epithelial cells