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Eye structure

Total questions: 37

Worksheet time: 13mins

Name
Class
Date
1.

#3 Refers to the circular structure that surrounds the pupil and regulates the amount of light entering the eye.

a)

Cornea

b)

Pupil

c)

Retina

d)

Iris

2.

Under conditions of bright light, the pupil __________ because the circular muscles of the iris _______________.

a)

dilates, contract

b)

dilates, relax

c)

constricts, contract

d)

constricts, relax

3.
What is the blind spot
a)
Produces aqueous humor and controls the lense shape
b)
Whites of the eye and provides structure
c)
The area where the optic nerve  attaches , and no retina is located
, so there is no information to be picked up
4.
What is the outer tough layer of the eye?
a)
Lens
b)
iris
c)
pupil
d)
Sclera 
5.
What part of the eye are the cones located
a)
Iris
b)
lens
c)
retina
d)
pupil
6.
When you enter a dark room, what does the pupil do
a)
get larger
b)
get smaller
7.

Rods are light sensitive cells in the retina that

a)

give you color vision in dim light

b)

respond in dim light

c)

give you color vision in bright light

d)

respond in bright light

8.

Cones are light sensitive cells in the retina that

a)

give you color vision in bright light

b)

respond in dim light

c)

give you color vision in dim light

d)

respond in bright light

9.

The cornea

a)

helps protect the eye

b)

begins bending light to make an image

c)

both of the above

d)

none of the above

10.
What part of the eye is this?
a)
cornea
b)
lens
c)
iris
d)
cilicary body
11.

Where does light refract?

a)

Lens

b)

Cornea

c)

Pupil

d)

Optic Nerve

12.

What part of the eye has color and is a muscle?

a)

cornea

b)

vitreous humor

c)

optic nerve

d)

iris

13.
Which parts of your eye are transparent?
a)
retina
b)
optic nerve
c)
cornea and lens
d)
iris
14.
Which part of the eye focuses light onto the retina? 
a)
Cornea
b)
Pupil
c)
Lens
d)
Optic Nerve
15.
In order for your brain to process the light waves that enter your eye, what must your eye do to those waves before sending them to the brain?
a)
Nothing, the light waves just get sent to the brain.
b)
Light waves have to be converted into sound waves by the eye. 
c)
Light waves have to be converted into nerve impulses by the eye. 
d)
Light waves have to be refracted by the eye. 
16.
What part of the eye is labeled G?
a)
Retina
b)
Choroid
c)
Optic Nerve
d)
Sclera
17.
What part of the eye is labeled A?
a)
Lens
b)
Cornea
c)
Sclera
d)
Iris
18.
What part of the eye is labeled E?
a)
Retina
b)
Lens
c)
Cornea
d)
Sclera
19.
What part of the eye is labeled B?
a)
Lens
b)
Cornea
c)
Iris
d)
Pupil
20.
What part of the eye is labeled C?
a)
Iris
b)
Lena
c)
Cornea
d)
Pupil
21.
What contains photoreceptor cells?
a)
Lens
b)
Retina
c)
Iris
d)
Pupil
22.
What focuses light entering the eye on the retina?
a)
Pupil
b)
Iris
c)
Lens
d)
Cornea
23.

The white part of the eye made of a tough material

a)

lens

b)

sclera

c)

retina

d)

optic nerve

24.

Structure i is the _________.

a)

Sclera

b)

Iris

c)

Retina

d)

Cornea

e)

Choroid

25.

The blind spot is created by the

a)

retina

b)

optic nerve leaving the eye through the retina

c)

nothing; we don't have one

26.
Which of the following is the correct order in which light travels through the eye?  
a)
Cornea, Lens, Retina, Pupil, Optic Nerve
b)
Pupil, Cornea, Lens, Retina, Optic Nerve
c)
Cornea, Retina, Lens, Pupil, Optic Nerve
d)
Cornea, Pupil, Lens, Retina, Optic Nerve
27.

Under conditions of dim light, the pupil __________ because the radial muscles of the iris ____________.

a)

dilates, contract

b)

dilates, relax

c)

constricts, contract

d)

constricts, relax

28.

In a reflex action, the __________ bypasses the ___________

a)

Motor neuron, brain

b)

Sensory neuron, brain

c)

Sensory neuron, spinal cord

d)

Motor neuron, spinal cord

29.
What neuron is this?
a)
Relay
b)
Motor
c)
Reflex
d)
Sensory
30.
What neuron is this?
a)
motor
b)
sensory
c)
relay
d)
reflex
31.
What makes up the CNS
a)
brain and spinal cord
b)
brain and neurons
c)
brain
d)
spine and neurons
32.
What light sensitive cells are stimulated in dim light?
a)
rods
b)
cones
33.

What part of the eye controls lens shape?

a)

choroid

b)

pupil

c)

iris

d)

ciliary body

34.
The fibrous covering of the eye consists of the white outer layer, known as the _____, and a transparent portion known as the _____.
a)
pupil; cornea
b)
iris; pupil
c)
conjunctiva; sclera
d)
sclera; cornea
35.
Cones come in all of the following colors EXCEPT:
a)
Red
b)
Yellow
c)
Green 
d)
Blue
36.
What is the function of the lens?
a)
clear structure that bends light to focus on the retina
b)
thin structure that controls the pupil
c)
clear, watery fluid
d)
where the optic nerve attaches
37.
The 2 parts of your eye that refract light are the ____ and _____.
a)
pupil & cornea
b)
iris & lens
c)
pupil & lens
d)
cornea & lens

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