T — Eye

Question 1

Which part of the brain is primarily responsible for vision?
A) Parietal lobe
B) Temporal lobe
C) Occipital lobe
D) Frontal lobe

Answer 1

c

Question 2

What is the function of the sclera?
A) Converts light into electrical signals
B) Controls the amount of light entering the eye
C) Covers the exposed portion of the eye
D) Focuses incoming light onto the retina

Answer 2

c

Question 3

Which two blood vessels supply the eye with nutrients?
A) Choroidal and retinal vessels
B) Optic and corneal arteries
C) Retinal and scleral capillaries
D) Pupillary and aqueous vessels

Answer 3

a

Question 4

What is the role of the retina?
A) Focuses incoming light onto the eye
B) Regulates the size of the pupil
C) Contains photoreceptors that convert light into electrical signals
D) Protects the eye from external damage

Answer 4

c

Question 5

What is the function of the cornea?
A) Absorbs excess light to reduce glare
B) Gathers and focuses incoming light
C) Controls eye movement
D) Regulates blood flow to the eye

Answer 5

b

Question 6

6What is the colored part of the eye called?
A) Sclera
B) Retina
C) Cornea
D) Iris

Answer 6

d

Question 7

Where is the anterior chamber located?
A) Between the iris and the lens
B) In front of the iris
C) Behind the retina
D) Surrounding the optic nerve

Answer 7

b

Question 8

The posterior chamber is located:
A) Between the cornea and iris
B) Behind the retina
C) Between the iris and the lens
D) Surrounding the optic nerve

Answer 8

c

Question 9

What is the function of the dilator pupillae muscle?
A) Increases the size of the pupil in response to fight-or-flight signals
B) Reduces the size of the pupil in bright light
C) Adjusts the focus of the lens
D) Converts light into electrical signals

Answer 9

a

Question 10

What does the constrictor pupillae muscle do?
A) Dilates the pupil during stress
B) Constricts the pupil in response to rest-and-digest signals
C) Sends signals from the eye to the brain
D) Controls blood flow to the retina

Answer 10

b

Question 11

What is the function of aqueous humor?
A) Transmits electrical signals from the retina to the brain
B) Fills the front part of the eye and drains through the canal of Schlemm
C) Adjusts the shape of the lens for focusing
D) Detects differences in brightness and color

Answer 11

b

Question 12

Where is aqueous humor produced?
A) Vitreous body
B) Retina
C) Ciliary body
D) Optic nerve

Answer 12

c

Question 13

What is the role of the lens?
A) Converts light into electrical signals
B) Controls how light is bent or refracted to focus images
C) Detects color and fine details
D) Regulates pupil dilation and constriction

Answer 13

b

Question 14

What does the ciliary muscle do?
A) Produces aqueous humor for the front of the eye
B) Changes the shape of the lens to help focus on objects at different distances
C) Detects differences in light intensity
D) Controls the contraction of the iris

Answer 14

b

Question 15

Which structure helps maintain the shape of the eye and keep the retina in place?
A) Ciliary body
B) Aqueous humor
C) Vitreous humor
D) Lens

Answer 15

c

Question 16

According to the duplicity theory of vision, the retina contains:
A) Two types of photoreceptors, one for light/dark and one for color
B) Only cones for high-acuity vision
C) A single type of receptor for all light detection
D) A network of neurons without specialized receptors

Answer 16

a

Question 17

Which of the following is NOT a function of cones?
A) Detecting fine details
B) Functioning well in bright light
C) Providing color vision
D) High sensitivity to dim light

Answer 17

d

Question 18

How many types of cones are there, and what colors do they detect?
A) Two types: blue and yellow
B) Three types: short (blue), medium (green), long (red)
C) One type: black and white vision
D) Four types: red, blue, green, yellow

Answer 18

b

Question 19

What is the primary function of rods?
A) Detecting fine details and color
B) High-resolution vision in bright light
C) Sensing light and dark, but not color
D) Regulating the shape of the lens

Answer 19

c

Question 20

What is the single pigment found in rods?
A) Rhodopsin
B) Melanin
C) Opsin
D) Photopsin

Answer 20

a

Question 21

What is the fovea?
A) A cluster of rods in the periphery of the retina
B) The center of the macula that contains only cones
C) A region in the thalamus that processes vision
D) A structure that connects the retina to the brain

Answer 21

b

Question 22

Which cells do rods and cones directly connect to?
A) Ganglion cells
B) Parvocellular cells
C) Bipolar cells
D) Magnocellular cells

Answer 22

c

Question 23

What do ganglion cells do?
A) Detect motion and spatial resolution
B) Highlight differences between rods and cones
C) Form the optic nerve and send visual signals to the brain
D) Process information about brightness changes

Answer 23

c

Question 24

Where are horizontal and bipolar cells located?
A) In the optic nerve
B) In the occipital lobe
C) Behind the rods and cones
D) In front of the rods and cones, closer to the front of the eye

Answer 24

d

Question 25

Why can color vision detect more detail than black-and-white vision? A) Cones are more sensitive to motion than rods B) Fewer cones connect to a single ganglion cell compared to rods C) Rods are concentrated in the fovea D) Black-and-white vision has higher spatial resolution

Answer 25

b

Question 26

What is parallel processing in vision? A) The ability to detect motion without seeing color B) The recognition of color, shape, and motion simultaneously C) The crossing of optic nerves in the optic chiasm D) The conversion of visual signals into electrical impulses

Answer 26

b

Question 27

What is spatial resolution? A) The ability to detect fine details of an object B) The speed at which objects move in the field of vision C) The processing of visual signals in the optic chiasm D) The ability to distinguish between colors in dim light

Answer 27

a

Question 28

What type of cells detect shape and have high spatial resolution? A) Magnocellular cells B) Ganglion cells C) Parvocellular cells D) Rhodopsin cells

Answer 28

c

Question 29

What does temporal resolution refer to? A) The ability to detect motion over time B) The ability to process color and brightness changes C) The crossing of visual signals at the optic chiasm D) The adaptation of the pupil to different light conditions

Answer 29

a

Question 30

What is the function of magnocellular cells? A) Detecting color and shape B) Detecting motion with high temporal resolution C) Detecting motion with low spatial resolution D) Processing fine visual details

Answer 30

c

Question 31

Which brain region processes visual information? A) Parietal lobe B) Visual cortex in the occipital lobe C) Temporal lobe D) Thalamus

Answer 31

b

Question 32

What happens at the optic chiasm? A) The retina sends signals directly to the occipital lobe B) Visual signals cross over before reaching the brain C) The pupil dilates in response to light D) Ganglion cells process visual information

Answer 32

b

Question 33

What is the function of the lateral geniculate nucleus? A) Detecting motion and color differences B) Converting light into electrical signals C) Relaying visual information from the retina to the visual cortex D) Regulating the amount of light entering the eye

Answer 33

c

Question 34

How does the sympathetic nervous system affect vision? A) It constricts the pupil to restrict light B) It dilates the pupil to allow more light in C) It increases the sensitivity of rods to detect color D) It decreases the brain’s ability to process visual signals

Answer 34

b

Question 35

What does the parasympathetic nervous system do in relation to vision? A) It dilates the pupil for better vision in low light B) It increases the sensitivity of the retina to bright light C) It constricts the pupil to reduce light intake D) It enhances the processing of motion and shape

Answer 35

c