KIN 2Y03 TEST 7 with 199 complete
solutions.
KIN 2Y03: TEST 7 with 199 complete
solutions.
Accessory structure: eyebrows - function (2) - ANSWER 1) Shade eyes from sun2) Protect against
perspiration
Accessory structure: eyelids 1) what are they also known as 2) what do they help with (3) - ANSWER 1)
palpebrae (plural)2) i. shade eyes durin sleepii. Protect from excessive lightiii. Lubricate tear ducts
what is the palpebrae fissure? - ANSWER OPENING for the eye
what are the different commissures in the eye + WHERE are they? (2)HINT: commissures are where the
upper and lower eyelids meet - ANSWER 1) Lateral commissure: narrower and closer to the temporal
bone2) Medial commissure: broader and near the nasal bone>>> also: has lacriMal caruncle (see other
card for what this is)
what is the lacrimal caruncle? - ANSWER contains modified oil and sweat glands
what is the conjunctiva? - ANSWER mucous membrane that forms the INNER lining of the eyelid
(continuous with inner lining of the eyelids)>> covers front surface of eye/sclera and inner eyelid
what are the two types of conjunctiva + what makes them different? - ANSWER 1) palpebral conjunctiva:
lines the eyelid2) bulbar (think of a bulb) conjunctiva: lines the white of the eye
purpose of the conjunctiva? + example of something that could go wrong with the conjunctiva? -
ANSWER forms pocket which stops debris (eyelashes, contacts) form entering the posterior portion of
the eyeEXAMPLE: responds to irritants that may cause inflammation = CONJUNCTIVITIS. Pink eye is a
bacterial infection
what is the lacrimal apparatus and what is its purpose? - ANSWER 1) what: contains MULTIPLE
structures 2) produces and drains tears/lacrimal fluid through LACRIMATION
,KIN 2Y03 TEST 7 with 199 complete
solutions.
flow of tears (6) - ANSWER 1) lacrimal gland2) lacrimal ducts3) superior or inferior lacrimal canaliculi4)
lacrimal sac5) nasolacrimal duct6) nasal cavity
purpose of lacrimal gland - ANSWER secretes tears
purpose of lacrimal ducts - ANSWER distributes tears over eyeball surface
purpose of superior or inferior lacrimal canaliculi - ANSWER drains tears into lacrimal sac
purpose of lacrimal sac - ANSWER drains tears into NASOlacrimal duct
purpose of nasolacrimal duct - ANSWER drains tears into the nasal cavity
why do you have a runny nose when you cry? - ANSWER because excess tears drain into the nasal cavity
1) how many extrinsic muscles are there?2) name them - ANSWER 1) 6Names:
1) superior obilique
2) superior rectus
3) medial rectus
4) lateral rectus
5) inferior rectus
6) inferior oblique(therefore, four rectus, bc it includes a medial and lateral, and 2 obliques)
what happens when the rectus mucles contract? - ANSWER they contract along their length which
allows for the movement in the diff directions
, KIN 2Y03 TEST 7 with 199 complete
solutions.
what do the obliques act as? - ANSWER as a pulley that allows for inferior and LATERAL orientation of
the eye (preserve rotational stability)
how many layers (tunics) is the eye comprised of and what are they? - ANSWER THREE!1) Fibrous tunic2)
Vascular tunic3) Retina
Tunics of the eye: FIBROUS TUNIC> What are the 2 main functions? - ANSWER Tunics of the eye:
FIBROUS TUNIC> What are the 2 main functions?
what does the sclera do? - ANSWER provides protection and shape for structures that are deeper to it
1) what does the cornea do? 2) Is it avascular?3) where is the cornea? - ANSWER 1) admits and refracts
light (bends)2) NOT avascular. Has no blood supply so it gets oxygen from the outside (that's why
contacts should be breatheable)3) location of cornea: the clear front surface of the eye + allows light to
enter
Tunics of the eye: VASCULAR TUNIC> what are key structures to be aware of? (hint: 2/3 are anterior) -
ANSWER this layer has a lot of blood vessels (hence name) + cells that contain melanin
1) posterior: choroid = blood supply
2) anterior:
i. ciliary body: has smooth muscles involved in changing shape of lens
ii. Iris = coloured portion of the eye: changes muscles to change diameter of the pupil
purpose of the iris - ANSWER controls the size of the pupil based on autonomic reflexes
(paraysmpathetic or sympathetic)
relationship between the iris and the pupil - ANSWER iris = coloured portion while the pupil constricts
AS A RESULT OF THE MUSCLES OF THE IRIS
Tunics of the eye: RETINA> What does it contain + function? - ANSWER THE INNERMOST LAYER OF THE
EYE
solutions.
KIN 2Y03: TEST 7 with 199 complete
solutions.
Accessory structure: eyebrows - function (2) - ANSWER 1) Shade eyes from sun2) Protect against
perspiration
Accessory structure: eyelids 1) what are they also known as 2) what do they help with (3) - ANSWER 1)
palpebrae (plural)2) i. shade eyes durin sleepii. Protect from excessive lightiii. Lubricate tear ducts
what is the palpebrae fissure? - ANSWER OPENING for the eye
what are the different commissures in the eye + WHERE are they? (2)HINT: commissures are where the
upper and lower eyelids meet - ANSWER 1) Lateral commissure: narrower and closer to the temporal
bone2) Medial commissure: broader and near the nasal bone>>> also: has lacriMal caruncle (see other
card for what this is)
what is the lacrimal caruncle? - ANSWER contains modified oil and sweat glands
what is the conjunctiva? - ANSWER mucous membrane that forms the INNER lining of the eyelid
(continuous with inner lining of the eyelids)>> covers front surface of eye/sclera and inner eyelid
what are the two types of conjunctiva + what makes them different? - ANSWER 1) palpebral conjunctiva:
lines the eyelid2) bulbar (think of a bulb) conjunctiva: lines the white of the eye
purpose of the conjunctiva? + example of something that could go wrong with the conjunctiva? -
ANSWER forms pocket which stops debris (eyelashes, contacts) form entering the posterior portion of
the eyeEXAMPLE: responds to irritants that may cause inflammation = CONJUNCTIVITIS. Pink eye is a
bacterial infection
what is the lacrimal apparatus and what is its purpose? - ANSWER 1) what: contains MULTIPLE
structures 2) produces and drains tears/lacrimal fluid through LACRIMATION
,KIN 2Y03 TEST 7 with 199 complete
solutions.
flow of tears (6) - ANSWER 1) lacrimal gland2) lacrimal ducts3) superior or inferior lacrimal canaliculi4)
lacrimal sac5) nasolacrimal duct6) nasal cavity
purpose of lacrimal gland - ANSWER secretes tears
purpose of lacrimal ducts - ANSWER distributes tears over eyeball surface
purpose of superior or inferior lacrimal canaliculi - ANSWER drains tears into lacrimal sac
purpose of lacrimal sac - ANSWER drains tears into NASOlacrimal duct
purpose of nasolacrimal duct - ANSWER drains tears into the nasal cavity
why do you have a runny nose when you cry? - ANSWER because excess tears drain into the nasal cavity
1) how many extrinsic muscles are there?2) name them - ANSWER 1) 6Names:
1) superior obilique
2) superior rectus
3) medial rectus
4) lateral rectus
5) inferior rectus
6) inferior oblique(therefore, four rectus, bc it includes a medial and lateral, and 2 obliques)
what happens when the rectus mucles contract? - ANSWER they contract along their length which
allows for the movement in the diff directions
, KIN 2Y03 TEST 7 with 199 complete
solutions.
what do the obliques act as? - ANSWER as a pulley that allows for inferior and LATERAL orientation of
the eye (preserve rotational stability)
how many layers (tunics) is the eye comprised of and what are they? - ANSWER THREE!1) Fibrous tunic2)
Vascular tunic3) Retina
Tunics of the eye: FIBROUS TUNIC> What are the 2 main functions? - ANSWER Tunics of the eye:
FIBROUS TUNIC> What are the 2 main functions?
what does the sclera do? - ANSWER provides protection and shape for structures that are deeper to it
1) what does the cornea do? 2) Is it avascular?3) where is the cornea? - ANSWER 1) admits and refracts
light (bends)2) NOT avascular. Has no blood supply so it gets oxygen from the outside (that's why
contacts should be breatheable)3) location of cornea: the clear front surface of the eye + allows light to
enter
Tunics of the eye: VASCULAR TUNIC> what are key structures to be aware of? (hint: 2/3 are anterior) -
ANSWER this layer has a lot of blood vessels (hence name) + cells that contain melanin
1) posterior: choroid = blood supply
2) anterior:
i. ciliary body: has smooth muscles involved in changing shape of lens
ii. Iris = coloured portion of the eye: changes muscles to change diameter of the pupil
purpose of the iris - ANSWER controls the size of the pupil based on autonomic reflexes
(paraysmpathetic or sympathetic)
relationship between the iris and the pupil - ANSWER iris = coloured portion while the pupil constricts
AS A RESULT OF THE MUSCLES OF THE IRIS
Tunics of the eye: RETINA> What does it contain + function? - ANSWER THE INNERMOST LAYER OF THE
EYE
