Ch. 3: The Eye

Question 1

Electromagnetic energy

Answer 1

A form of energy that includes light that is simultaneously both a wave and a particle

Question 2

Electromagnetic spectrum

Answer 2

The complete range of wavelengths of light and other electromagnetic energy

Question 3

Photon

Answer 3

Single particle of light

Question 4

Cornea

Answer 4

The clear from the surface of the guy that allows lighten; also a major focusing element of the eye

Question 5

Pupillary reflex

Answer 5

automatic process by which the iris contracts or relaxes in response to the amount of light entering the eye; the reflex controls the size of the pupil

Question 6

Lens

Answer 6

The adjustable, focusing element of the eye, located right behind the iris; also called Crystaline lens

Question 7

Accommodation

Answer 7

the process of adjusting the lens of the eye so that both near and for objects can be seen clearly

Question 8

Ciliary Muscle

Answer 8

The small muscles that change the curvature of the lens, allowing accommodation

Question 9

Zonule fibers

Answer 9

Fibers that connect the lines to the choroid membrane

Question 10

Presbyopia

Answer 10

A condition in which incoming light focus is behind the retina, leading to difficulty focusing on close up objects; common in older adults, and whom the lens becomes less elastic

Question 11

Retina

Answer 11

The paper thin layer of cells at the back of the eye where transduction takes place

Question 12

Fovea

Answer 12

An area on the right now that is dance and cones, but lacks rods; when we look directly at an object, it’s image falls on the fovea

Question 13

Macula

Answer 13

The center of the retina; the macular includes the fovea, but is larger than it

Question 14

Optic disc

Answer 14

The part of the right now where the optic nerve with eye and heads to the brain; along optic disc, there are no receptor cells

Question 15

Photo pigment

Answer 15

A molecule that absorbs light and by doing so releases an electric potential by altering the voltage in the cell

Question 16

Opsin

Answer 16

Protein portion of a photopigment that captures the photon of light and begins process of transduction

Question 17

Retinal

Answer 17

A derivative of vitamin A that is part of the photopigment

Question 18

Duplex theory of vision

Answer 18

Functionally two distinct ways in which your eyes work, the phototopic associated with the cones and the scotopic associated with the rods

Question 19

Photopic vision

Answer 19

Associated with cones and has good acuity in the fovea

Question 20

Scotopic vision

Answer 20

Vision associated with the rods in his poor acuity, no color ability, but it’s very sensitive to light

Question 21

Horizontal Cells

Answer 21

receives info from photoreceptors and other horizonal cells to cross talk

Question 22

Bipolar cells

Answer 22

receive information from photoreceptors to send to ganglion cells

Question 23

Amacrine cells

Answer 23

Receive information from bipolar cells and other amacrine cells to cross talk

Question 24

Retinal Ganglia

Answer 24

receive info from bipolar cells to send to brain via optic nerve