Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Biology 🧬 > The Eye > Flashcards

The Eye Flashcards

You may prefer our related Brainscape-certified flashcards:
AP® Biology flashcards Biology 101 flashcards
1
Q

What is the function of the iris?

A

It controls how much light enters the pupil.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is the function of the cornea?

A

It refracts light and protects the eye.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is the function of the lens?

A

It focuses light onto the retina.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is the function of the optic nerve?

A

Bundle of sensory neurones that carry impulses to the brain.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is the function of the retina?

A

Layer of tissues at the back of the eye that contains light receptor cells. (rods and cones)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is the function of the fovea?

A

Area of the retina with highest concentration of the cone cells that provides sharp vision.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is the function of the aqueous humour?

A

Maintains the pressure in the eye and nourishes the cornea.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is the function of the vitreous humour?

A

Maintains the shape of the eye and attaches to the retina.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is the function of the ciliary muscles?

A

Help change the shape of the lens in accommodation.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

what is the function of the sclera?

A

Tough outer layer that the muscles that move the eyeball attach to.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is the function of the pupil?

A

Help the centre of the eye that lets light in.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Explain what happens to the eye in terms of the iris reflex in bright light.

A

Circular muscles contract
radial muscles relax
pupils constrict

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Explain what happens to the eye in terms of the iris reflex in dim light.

A

Circular muscles relax
radial muscles contract
pupils dilate

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is the name for eye focussing?

A

Accommodation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is accommodation controlled by?

A

suspensory ligaments and ciliary muscles

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What happens to the eye when focussing on a distant object?

A

Ciliary muscles relax
Suspensory ligaments tighten
Lens is pulled thin

17
Q

What happens to the eye when focussing on a close object?

A

Ciliary muscles contract
Suspensory ligaments slacken
Lens becomes fatter.

18
Q

What is the function of the conjunctiva?

A

A mucous membrane that covers the eye to prevent infection.

Biology 🧬 (13 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions