Sensation And Perception Chpt 1

Front 1

Synaptic vesicles contain chemicals called _________ that are released across the synapse to the next neuron.

Back 1

neurotransmitters

Front 2

Acuity develops to almost 20/20 vision by the time the infant is

Back 2

one year old

Front 3

As stimulus intensity is increased, recording from a single neuron shows

Back 3

the rate of firing of the nerve fiber increases.

Front 4

Light can be described in terms of wavelength, or as consisting of small packets of energy called

Back 4

photons.

Front 5

The visual pigment molecules are contained in the

Back 5

outer segments of the visual receptors.

Front 6

Rushton demonstrated that the physiological mechanism behind dark adaptation is

Back 6

visual pigment regeneration.

Front 7

Cone spectral sensitivity is measured by having the observer

Back 7

look directly into a light.

Front 8

The Purkinje shift

Back 8

is when reds appear brighter than blues in well-lit conditions, but blues appear brighter than reds in dim conditions.

Front 9

Individual suffering from myopia may have difficulty seeing _______ objects clearly. Often times they are also referred to as being _______.

Back 9

distant; nearsighted

Front 10

A wavelength of 100 nm would fall in the ______ range of the electromagnetic spectrum.

Back 10

ultraviolet rays

Front 11

The “rod-cone break” in the dark adaptation curve occurs after about ___ in the dark.

Back 11

7 minutes

Front 12

Jan tries to focus on the tip of her pencil as she brings it closer to her. She feels the strain on her eye as she does this. What she is feeling in her eye is due to the process called

Back 12

accommodation.

Front 13

Convergence results in _________ sensitivity and _______ acuity.

Back 13

increased; decreased

Front 14

Nina does a demonstration of “seeing” the blind spot, in which a grid pattern surrounds the black dot that disappears when it falls on the blind spot. What does Nina most likely see in the area where the dot disappears?

Back 14

a continuation of the grid pattern

Front 15

Rods and cones synapse with ______ cells, which then synapse with ____ cells.

Back 15

bipolar; ganglion

Front 16

A retinal condition that destroys the cones in the fovea is

Back 16

macular degeneration.

Front 17

In the early stages of _______, peripheral rod receptors are destroyed leading to poorer peripheral vision.

Back 17

retinitis pigmentosa

Front 18

The structure of the eye that provides about 80% of the eye’s focusing power is the

Back 18

cornea.