5. Sensation and Perception Part 3

Question 1

Where is opsin located and what is its function?

Answer 1

protein attached to rods and cones
change tertiary structure once light is absorbed

Question 2

What is retinal?

Answer 2

molecule derived from vitamin A that is bound to each molecule of opsin

Question 3

Where do rods and cones synapse?

Answer 3

bipolar cells

Question 4

What neurotransmitter do rods and cones produce?

Answer 4

glutamate

Question 5

What are the two types of bipolar cells?

Answer 5

on-center
off-center

Question 6

What is reponsible for night vision?

Answer 6

rods

Question 7

What is responsible for color vision?

Answer 7

cones

Question 8

How many types of cones are there?

Answer 8

three; blue, red, and green light specific

Question 9

What is emmetropia?

Answer 9

normal vision

Question 10

What is myopia and what causes it?

Answer 10

nearsightedness caused by too much curvature of the lens causing light to focus in front of the retina

Question 11

What is hyperopia and what causes it?

Answer 11

farsightedness caused by too little curvature of the lens causing light to focus behind the retina

Question 12

What is presbyopia and what causes it?

Answer 12

inability to accommodate and focus caused by loss of flexibility in the lens due to aging

Question 13

What is a humans primary sense?

Answer 13

vision

Question 14

What is the visual cortex?

Answer 14

neurons fire in response to particular visual features

Question 15

What is the feature detection theory?

Answer 15

explains why a certain area of the brain is activated when looking at different images

Question 16

What is parallel processing?

Answer 16

many aspects of a visual stimulus are process simultaneously

Question 17

What are absolute thresholds?

Answer 17

minimum stimulus intensity required to activate a sensory receptor 50% of the time

Question 18

What are difference thresholds?

Answer 18

minimum noticeable differences between any two sensory stimuli 50% of the time

Question 19

What is the signal detection theory?

Answer 19

attempts to predict how and when someone will detect the presence of a given sensory stimulus amidst all of the other stimuli in the background

Question 20

What are the four possible outcomes for the signal detection theory?

Answer 20

hit
miss
false alarm
correct rejection

Question 21

What is Gestalt Psychology?

Answer 21

believes the whole exceeds the sum of its parts