Chapter 15: General And Special Senses

Question 1

The scelera is continuous with what part of the eye?

Answer 1

The cornea

Question 2

What part of the eye controls the entrance of light?

Answer 2

The iris

Question 3

What are photoreceptors?

Answer 3

Parts of the eye that transduce and detect light stimuli into electrical signals

Question 4

What are the pohoreceptpr cell types?

Answer 4

Rods and cones

Question 5

What lets us see black and white?

Answer 5

Rods

Question 6

What lets us see in color?

Answer 6

Cones

Question 7

What does the lens do?

Answer 7

Focuses light on retina from objects near the eye

Question 8

Where does the aqueous humor come from?

Answer 8

Ciliary body

Question 9

What is the difference between aqueous and vitreous humor?

Answer 9

Aqueous - water like fluid that lies in front of the lens
VITREOUS - Gel like substance that lies behind the lens and in front of the retina

Question 10

What parts of the eye retracts light as it enters?

Answer 10

Lens, cornea, aqueous humor and vitreous humor

Question 11

What is the autonomic ability for the lens to change shape when seeing far or near?

Answer 11

Accomodation

Question 12

What is color blindness?

Answer 12

When a person lacks the functional gene for one or more cone pigments

Question 13

What is glaucoma?

Answer 13

This is when the aqueous humor in the eyes cannot drain, making fluid build up in anterior and posterior chambers, and excess fluid raises pressure inside the eyeball

Question 14

What are cataract?

Answer 14

Clouded lens that can be caused by UV radiation, aging, trauma etc

Question 15

What is myopia?

Answer 15

Nearsightedness, where the distance between the cornea and the lens is too great or the cornea is too curved

Question 16

What is hyperopia?

Answer 16

Farsightedness, when the eyeball is too short or the cornea is too flat

Question 17

What system allows for detection or odorants in the air, transducing them into signals known as odors?

Answer 17

Olafactory system

Question 18

What structure prevents perspiration from running into the eye?

Answer 18

Eyebrows

Question 19

What structure reduces eye injury?

Answer 19

Lashes

Question 20

What kind of conjunctiva covers the inner eyelid surface?

Answer 20

Palpebral

Question 21

What kind of conjunctiva covers the white part of the eyeball?

Answer 21

Bulbar/occular

Question 22

What produces and drains tears from the eye?

Answer 22

Lacrimal gland

Question 23

What drains into the nasolascrimal duct?

Answer 23

Lacrimal sac

Question 24

What causes the stuffy nose when crying?

Answer 24

Nasolacrimal duct

Question 25

What are the 3 distinct layers of the eyeball?

Answer 25

Fiburous, vascular and neural

Question 26

What layer is pretty avascular, the outside and contains the sclera and cornea?

Answer 26

Fiburous

Question 27

Where is the iris, cilliary body and choroid?

Answer 27

Vascular layer

Question 28

Where is the retina?

Answer 28

Neural layer

Question 29

What enlarges the pupil?

Answer 29

Radial pattern

Question 30

What decreases the size of the pupil?

Answer 30

Circular muscles

Question 31

What part of the eye is there no photoreceptors and no blind spot?

Answer 31

Optic disc

Question 32

What part of the eye had the largest amount of photoreceptors?

Answer 32

Fovea centralis

Question 33

What does the ciliary body secrete?

Answer 33

Aqueous humor

Question 34

What part of the eye contains cells that lack nuclei?

Answer 34

Lens

Question 35

What part of the ear is involved with vestibular sense (coordination and balance)?

Answer 35

Inner ear

Question 36

Where is the tympanic membrane?

Answer 36

Eardrum

Question 37

What can cause you to be seasick?

Answer 37

Eardrum