U2 Lab Practical: Sheep Eye Dissection

Last updated 5 months ago

21 questions

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What does the choroid layer provide? Check all that apply.

oxygen via blood

preceived color

fluid to keep the shape of the eye

nutrients via blood

Color vision in bright light.

Providing sharp visual detail.

Detecting light in dim conditions.

Filtering UV light from the sun.

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Focuses light onto the retina.

Protects the eye from dust.

Enhances low-light vision at night.

Adjusts the lens for distance vision.

Regulates pupil size.

Protects the eye from injury.

Helps with color perception.

Focuses light onto the retina.

Neither rods nor cones detect color.

Cone cells are responsible for color vision.

Both rods and cones provide color vision.

Rod cells help in color vision.

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Provides protection and structure to the eye.

Helps the eye focus light.

Controls eye movement and alignment.

Regulates the amount of light entering the eye.

superior rectus

lateral rectus

medial rectus

inferior rectus

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Draggable item		Corresponding Item

It serves as an eyelid.

It covers the front of the eye.

It covers the pupil.

It lines the back of the eye.

brown

yellow

green

blue

Answer(s) Confidence Tracker:__________

Thank you for completing this Sum It Up!

iris

lens

sclera

retina

fatty tissue

tapetum lucidum

retina

cornea

iris

optic nerve

pupil

lens

What does the choroid layer provide?  Check all that apply.

oxygen via blood

preceived color

fluid to keep the shape of the eye

nutrients via blood

sclera

lens

retina

iris

protect eye and give it shape

allows light in

cushions/protects eye

translates light impuses to brain

ciliary muscles

blind spot

optic nerve

cones

iris

aqueous humor

lens

optic nerve

What is the primary function of rod cells in the eye?

Color vision in bright light.

Providing sharp visual detail.

Detecting light in dim conditions.

Filtering UV light from the sun.

What is the main function of the tapetum lucidum in a sheep eye?

Focuses light onto the retina.

Protects the eye from dust.

Enhances low-light vision at night.

Adjusts the lens for distance vision.

What is the main function of the lens in a sheep eye?

Regulates pupil size.

Protects the eye from injury.

Helps with color perception.

Focuses light onto the retina.

pupil

medial rectus muscle

optic nerve

cornea

It allows light in.

It carries visual messages.

It keeps the eye in the socket.

It makes the eyes move.

Which type of photoreceptor is responsible for color vision?

Neither rods nor cones detect color.

Cone cells are responsible for color vision.

Both rods and cones provide color vision.

Rod cells help in color vision.

yes

no

What is the main function of the sclera?

Provides protection and structure to the eye.

Helps the eye focus light.

Controls eye movement and alignment.

Regulates the amount of light entering the eye.

These eye muscles allow the sheep to move its eyes from side to side.  Check all that apply.

superior rectus

lateral rectus

medial rectus

inferior rectus

Draggable item		Corresponding Item
structure "F"		found in both sheep and human eyes
structure "E"		found in sheep eyes, not in human eyes

Where is the retina located?

It serves as an eyelid.

It covers the front of the eye.

It covers the pupil.

It lines the back of the eye.

What color is the iris of the sheep eye?

brown

yellow

green

blue

The structure labeled letter "A" helps send light into the eye.  What is the name of this structure

iris

lens

sclera

retina

What is the structure labeled letter "B"?

fatty tissue

tapetum lucidum

retina

cornea

The structure labeled letter "C" focuses images in the eye.  You colored it light blue in your notebook model.  What is the name of this structure?

iris

optic nerve

pupil

lens

What is the name of the structure that the forceps is pulling on?

sclera

lens

retina

iris

What is the function of the structure that the forceps is pulling on?

protect eye and give it shape

allows light in

cushions/protects eye

translates light impuses to brain

Where does the structure held by the forceps connect to the eye?

ciliary muscles

blind spot

optic nerve

cones

What is the name of the structure that looks like a pearl?

iris

aqueous humor

lens

optic nerve

This is a view of the back side of the sheep eye.  What is the structure labeled "G"?

pupil

medial rectus muscle

optic nerve

cornea

What is the function of the structure labeled "G"?

It allows light in.

It carries visual messages.

It keeps the eye in the socket.

It makes the eyes move.

Is this a sclera?

yes

no

Match

structure "F"

found in both sheep and human eyes

structure "E"

found in sheep eyes, not in human eyes