General Senses & The Eye

Question 1

Define exteroceptors

Answer 1

Respond to external stimuli

Question 2

Define interceptors

Answer 2

Respond to internal stimuli

Question 3

Define Proprioceptors

Answer 3

Respond to specific internal stimuli

Question 4

Extroceptors examples

Answer 4

Meissner corpuscle - light touch
Pacinian corpuscle - heavy touch
Free nerve ending - very light touch

Question 5

Introceptor examples

Answer 5

Secondary (type II muscle fibers) and primary ( type Ia muscle fibers) sensory endings

Question 6

Tactile 2pt discrimination test demonstrates what?

Answer 6

How finely innervated an area of skin is

Question 7

Tactile localization

Answer 7

Ability to identify the site of tactile stimulation

Question 8

Adaptation

Answer 8

Change in sensitivity with the same amount of stimuli

Question 9

Negative afterimage

Answer 9

Opposite perception due to adaptation

Question 10

Referred pain

Answer 10

Pain being perceived in an area different from the one actually receiving painful stimuli

Question 11

Projection

Answer 11

Brain referring sensations to usual point of stimulation

Question 12

Refraction

Answer 12

Light speeds or slows in different mediums which causes it to bend

Question 13

Accommodation

Answer 13

Ability for eye to focus on objects in near vision

Question 14

Emmetropia

Answer 14

Relaxed eye focused on object more than six meters away

Question 15

Hyperopia

Answer 15

Farsighted, light focus behind retina (convex)

Question 16

Astigmatism

Answer 16

Cornea or lens with improper curve

Question 17

Conjunctivitis

Answer 17

Pink eye, swelling of conjunctiva

Question 18

Cataract

Answer 18

Blurred vision because lens gets cloudy

Question 19

Myopia

Answer 19

Near sighted, light locus before retina (concave)

Question 20

Glaucoma

Answer 20

Increased eye pressure causing gradual loss of vision

Question 21

Lens flattens for?

Answer 21

Distant vision

Question 22

Lens budges for?

Answer 22

Close vision

Question 23

What happens in parasympathetic

Answer 23

Ciliary muscles contract thus loosening ligaments (radial muscles)

Question 24

What happens in sympathetic

Answer 24

Cillary muscles relax which tightens ligaments (circular muscles)

Question 25

Lesion in optic tract

Answer 25

Loss of vision on the opposite side

Question 26

Lesion in the optic nerve

Answer 26

Loss of vision in the same side

Question 27

Lesion in optic chiasm

Answer 27

Loss of peripheral vision

Question 28

Eyelid purpose

Answer 28

Protects eye anteriorly

Question 29

Eyelash purpose

Answer 29

Protects from border of eyelid

Question 30

Ciliary gland purpose

Answer 30

Modified sweat gland and conducts heat

Question 31

Conjunctiva

Answer 31

Lines eyelid and outer surface of eyeball

Question 32

Lacrimal gland

Answer 32

Tear formation

Question 33

Rods purpose

Answer 33

Helps see shades of grey in dim lighting

Question 34

Cones purpose

Answer 34

Helps see precisely and in color

Question 35

Pathway of light

Answer 35

Cornea to pupils to iris to lens to vitreous humor to retina

Question 36

Importance of ophthalmoscopic examination

Answer 36

Detects eye diseases and diabetes

Question 37

Importance of papillary and convergence reflexes

Answer 37

Constricts eye from bright light

Question 38

Anterior cavity contains what

Answer 38

Aqueous humor

Question 39

Posterior cavity contains what

Answer 39

Vitreous humor

Question 40

Cones are primarily found in what

Answer 40

Fovea centralis