Chapter 3

Question 1

What is sensation?

Answer 1

Activation of the sense organsbya source of physical energy

Question 2

What is perception?

Answer 2

Interpretation of stimuli

Question 3

Stimulus

Answer 3

Energy that produces A response Ina sense organ

Question 4

Psychophysics

Answer 4

The study the relationship between:

Physical aspects of stimuli and our psychological experience of them

Question 5

Absolute thresholds

Question 6

Difference threshold

Question 7

Weber’s law

Question 8

Adaptation

Question 9

Vision

Answer 9

Your eyes convert light to a form used by neurons

Question 10

Cornea

Answer 10

A transparent, protective window at the front of the eye

Question 11

The iris

Answer 11

Colored part of the eye

Question 12

The pupil

Answer 12

Is the dark hole in the Center of the eye opening depends on amount of light

Question 13

Lens

Answer 13

Focuses light by changing shape

Question 14

Retina

Answer 14

Converts electromagnetic energy of light to electrical impulses for transmission to the brain

Question 15

Rods

Answer 15

Thin, cylinder likereceptor cells that are highly sensitive to light

Question 16

Cones

Answer 16

Cone shared receptor cells responsible for sharp focus and color perception

Question 17

Peripheral vision

Answer 17

Seeing objects that are outside the main center of focus

Question 18

Sound

Answer 18

Movement of air molecules brought about by a source of vibration

Question 19

Eardrum

Answer 19

Part of ear that vibrates when sound waves hit it:

Question 20

Ear drum middle ear 3 bones

Answer 20

Hammer, anvil, stirrups

Question 21

Inner ear

Answer 21

Changes the sound vibrations into a form transmittable the brain

Question 22

Cochlea

Answer 22

Coiled tube in the ear filled with fluid that vibrates in response to sound

Question 23

Basilar membrane

Answer 23

Inside the cochlea contains sense receptors for sound

Question 24

Hair cells

Answer 24

Tiny cells covering the basilar entering the membrane that, when bent by vibrations entering the cochlea, transmit neural messages to the brain

Question 25

Place theory of hearing

Answer 25

Different areas of the basilar membrane respond to different frequencies

Question 26

Frequency theory of hearing

Answer 26

Entire basilar membrane alas like a microphone, vibrating as a whole in response to a sound