TDLR Chapter 8 Part 1 Test Questions
with solved issues 2023/2024
What is our dominant sense? - ANSWER-vision
____ % of all the sensory receptors in the body are in our eyes. - ANSWER-70%
Nearly half of the _____ is involved in some aspect of visual processing. - ANSWER-cerebral cortex
How many layers does the eye have? - ANSWER-3
What is the diameter of the adult eye? - ANSWER-2.5 cm (1 inch)
Only ____ of the eye surface is visible. - ANSWER-1/6th
What is the part of the eye that is not visible protected by? - ANSWER-cushion of fat and the walls of the
orbit
______ occupies nearly all of the orbit not occupied by the eye. - ANSWER-fat pad
What are the accessory structures of the eye? (5) - ANSWER-eyebrows, eyelids, conjunctiva, lacrimal
apparatus, & extrinsic eye muscles
short, coarse hair that overlie the supraorbital region of the skull; prevent perspiration from trickling
down from forehead - ANSWER-eyebrows
separated by the palpebral fissure - ANSWER-eyelids
palpebral fissure- - ANSWER-eyeslit
,fleshy elevation located in the medial corner of the eyelid; contains sebaceous and sweat glands that
produce whitish, oily secretion that collects in the corner during sleep - ANSWER-lacrimal caruncle
What supports eyelids? - ANSWER-tarsal plates
Tarsal plates anchor ______ and _______ muscles that run within the eyelid. - ANSWER-the orbicularis
oculi; levator palpebrae superioris
Which eyelid is more mobile? - ANSWER-upper
Eyelids activate reflexively causing blinking every _____ seconds to protect eye from foreign objects. -
ANSWER-3-7
Each time we blink, ________ spread across the eyeball surface, keeping eyes moist. - ANSWER-
accessory structure secretions (oil, mucus, saline solution)
project from free margin of eyelid; richly innervated by nerve endings - ANSWER-eyelashes
What triggers reflex blinking? - ANSWER-Anything touching the eyelashes
embedded in tarsal plates; their ducts open at eyelid edge posterior to eyelashes - ANSWER-tarsal glands
produce oily secretion lubricating the eye and the eyelid, preventing eyelids from sticking together -
ANSWER-sebaceous glands
transparent mucous membrane - ANSWER-conjunctiva
Palpebral Conjunctiva- - ANSWER-lines the eyelids
, Bulbar Conjunctiva- - ANSWER-folds back over the anterior surface of the eyeball
When the eye is closed, a slitlike space occurs between the conjunctiva of the eyeball and the eyelid,
called the ____. - ANSWER-Conjunctival sac
where a contact lens lies, eye medication is administered - ANSWER-conjunctival sac
What is the major function of conjunctiva? - ANSWER-to produce lubricating mucus that prevents the
eye from drying out
_______ cover only the white of the eye, are very thin, and blood vessels are visible beneath it. -
ANSWER-bulbar conjunctiva
inflammation of the conjunctiva; reddened, irritated; infectious (bacteria, virus) highly contagious -
ANSWER-conjunctivitis; pink eye
consists of a lacrimal gland and the ducts that drain lacrimal secretions into nasal cavity - ANSWER-
lacrimal apparatus
lies in orbit above the lateral end of the eye; continually releases lacrimal secretions into superior part of
the conjunctival sac through several small excretory ducts - ANSWER-lacrimal gland
lacrimal secretions- - ANSWER-dilute salt solution; tears
Blinking spreads tears downward and across the eyeball where they enter paired _____, then drain into
the _____, and then drain into the _____, which empties into the nasal cavities. - ANSWER-lacrimal
canaliculi; lacrimal sac; nasolacrimal duct
Lacrimal secretions contain ____ and _____. - ANSWER-antibodies & lysozymes
enzyme that destroys bacteria - ANSWER-lysozyme
with solved issues 2023/2024
What is our dominant sense? - ANSWER-vision
____ % of all the sensory receptors in the body are in our eyes. - ANSWER-70%
Nearly half of the _____ is involved in some aspect of visual processing. - ANSWER-cerebral cortex
How many layers does the eye have? - ANSWER-3
What is the diameter of the adult eye? - ANSWER-2.5 cm (1 inch)
Only ____ of the eye surface is visible. - ANSWER-1/6th
What is the part of the eye that is not visible protected by? - ANSWER-cushion of fat and the walls of the
orbit
______ occupies nearly all of the orbit not occupied by the eye. - ANSWER-fat pad
What are the accessory structures of the eye? (5) - ANSWER-eyebrows, eyelids, conjunctiva, lacrimal
apparatus, & extrinsic eye muscles
short, coarse hair that overlie the supraorbital region of the skull; prevent perspiration from trickling
down from forehead - ANSWER-eyebrows
separated by the palpebral fissure - ANSWER-eyelids
palpebral fissure- - ANSWER-eyeslit
,fleshy elevation located in the medial corner of the eyelid; contains sebaceous and sweat glands that
produce whitish, oily secretion that collects in the corner during sleep - ANSWER-lacrimal caruncle
What supports eyelids? - ANSWER-tarsal plates
Tarsal plates anchor ______ and _______ muscles that run within the eyelid. - ANSWER-the orbicularis
oculi; levator palpebrae superioris
Which eyelid is more mobile? - ANSWER-upper
Eyelids activate reflexively causing blinking every _____ seconds to protect eye from foreign objects. -
ANSWER-3-7
Each time we blink, ________ spread across the eyeball surface, keeping eyes moist. - ANSWER-
accessory structure secretions (oil, mucus, saline solution)
project from free margin of eyelid; richly innervated by nerve endings - ANSWER-eyelashes
What triggers reflex blinking? - ANSWER-Anything touching the eyelashes
embedded in tarsal plates; their ducts open at eyelid edge posterior to eyelashes - ANSWER-tarsal glands
produce oily secretion lubricating the eye and the eyelid, preventing eyelids from sticking together -
ANSWER-sebaceous glands
transparent mucous membrane - ANSWER-conjunctiva
Palpebral Conjunctiva- - ANSWER-lines the eyelids
, Bulbar Conjunctiva- - ANSWER-folds back over the anterior surface of the eyeball
When the eye is closed, a slitlike space occurs between the conjunctiva of the eyeball and the eyelid,
called the ____. - ANSWER-Conjunctival sac
where a contact lens lies, eye medication is administered - ANSWER-conjunctival sac
What is the major function of conjunctiva? - ANSWER-to produce lubricating mucus that prevents the
eye from drying out
_______ cover only the white of the eye, are very thin, and blood vessels are visible beneath it. -
ANSWER-bulbar conjunctiva
inflammation of the conjunctiva; reddened, irritated; infectious (bacteria, virus) highly contagious -
ANSWER-conjunctivitis; pink eye
consists of a lacrimal gland and the ducts that drain lacrimal secretions into nasal cavity - ANSWER-
lacrimal apparatus
lies in orbit above the lateral end of the eye; continually releases lacrimal secretions into superior part of
the conjunctival sac through several small excretory ducts - ANSWER-lacrimal gland
lacrimal secretions- - ANSWER-dilute salt solution; tears
Blinking spreads tears downward and across the eyeball where they enter paired _____, then drain into
the _____, and then drain into the _____, which empties into the nasal cavities. - ANSWER-lacrimal
canaliculi; lacrimal sac; nasolacrimal duct
Lacrimal secretions contain ____ and _____. - ANSWER-antibodies & lysozymes
enzyme that destroys bacteria - ANSWER-lysozyme
