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ABO Exam Prep - Anatomy WITH ANSWERS GRADED A+
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ABO Exam Prep - Anatomy WITH ANSWERS GRADED A+
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10/4/24, 8:30 AMEUNICE
ABO Exam Prep – Anatomy WITH 100% SURE ANSWERS
Terms in this set (64)
Fibrous Tunic What three layers are the eye made up of?
Vascular Tunic
Nervous Tunic
Fibrous Tunic Consists of the sclera and the cornea.
Consists of the iris, the choroid, and the ciliary body and is responsible for
Vascular Tunic
nourishment
The inner layer of photoreceptors and neurons which consists of the retina;
Nervous Tunic
Contains rods and cones
Lets us see at twilight and in dimly lit rooms; does
not discriminate between different colors of light.
Rods
About 120 million rods
Cones require brighter light to function than rods do;
Cones Discriminate colors.
About 6 million in Fovea
Where light will focus in a
Macula
healthy eye
The highest concentration of cones is found at the fovea which is the center of the
Fovea
macula
The point where the optic nerve enters the eye;
Optic Disc (Blind Spot)
Does not contain receptor cells so it is sometimes called the "blind spot"
Anterior Chamber
What are the three fluid-filled chambers in
Posterior Chamber
the eye?
Vitreous Chamber
Anterior Chamber Located between the cornea and the iris
Posterior Chamber Located between the iris and the lens
Located between the retina and the lens;
Vitreous Chamber Is filled with a thicker gel-like substance called Vitreous humor which maintains the
shape of the eye
Watery fluid produced by the ciliary body. It maintains pressure (called intraocular
Aqueous Humor
pressure or IOP) and provides nutrients to the lens and cornea.
Canal of Schlemm Where the Aqueous Humor is continually drained from the eye.
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, 10/4/24, 8:30 AM
A transparent dome shaped layer that sits in front
of the eye and lets light enter through
Cornea
Epithelium
5 Distinct Cornea Layers
Bowman's Membrane
Stroma
Memory Hint: B comes before D and think
Descemet's Membrane
"end" for last layer.
Endothelium
Epithelium The outer most layer of the cornea which rests on Bowman's membrane
Bowman's Membrane Acts as a protective barrier of the Cornea
Located between the two membranes makes up 90% of the thickness of the
Stroma
cornea
Descemet's Membrane Separates the stroma and the endothelium of the Cornea
The inner most layer of the Cornea which removes water from cornea helping to
Endothelium
keep the cornea clear
Dilator Muscle Opens the iris allowing more light in
Sphincter Muscle Closes the iris
Iris has the ability to change the pupil size Iris has the ability to change the pupil size from 2 millimeters to 8 millimeters.
from ___ millimeters to ___ millimeters.
Crystalline Lens Focuses light on the retina. Sits just behind the pupil.
The process of focusing on objects based on their distance.
The closer an object is to the eye the more power is required of the crystalline lens
to focus the image on the retina.
Accommodation
BONUS) The lens achieves accommodation with the help of the ciliary body which
surrounds the
lens.
the structure between the choroid and the iris that
anchors the lens in place
Ciliary Body
fbrous strands connecting ciliary body and lens
Zonules
When the ciliary body contracts, the Relax;
zonules _____ allowing the lens to _ , Thicken
adding power,
allowing the eye to focus up close
When ciliary body relaxes, the zonules Contract;
_ ___ , drawing the lens outward, making Thinner
the lens ____, and allowing the eye to
focus at distance.
Another term for eyelid
Palpebrae
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