 | Term | Definition |
| |
glucagon |
a hormone that tends to increase levels of blood sugar |
| |
adrenal gland |
structure that creates adrenaline |
| |
convergence |
binocular depth perception process that involves muscle strain |
| |
Young-Helmholtz theory |
states that we process color vision using color-specific cones |
| |
frequency theory |
accounts for how we perceive low-pitched sounds |
| |
place theory |
accounts for how we perceive high-pitched sounds |
| |
frequency theory |
states that certain frequencies cause the entire basilar membrane to vibrate |
| |
place theory |
states that certain frequencies stimulate hair cells only in certain areas on the basilar membrane |
| |
optic chiasm |
here left visual field and right visual field are sorted out to be sent to the appropriate hemisphere of the brain |
| |
ganglion cell |
its axon forms part of the optic nerve |
| |
bipolar cell |
receives information from rods and cones and passes it on to ganglion cells |
| |
blind spot |
point where the optic nerve leaves the retina |
| |
trichromatic theory |
states that color vision is possible because we have RGB cones |
| |
transduction |
the process of changing one form energy to another |
| |
education |
means to "lead out of"; uses same root as transduction |
| |
signal detection theory |
explains why thresholds change for different people and in different situations |
| |
absolute threshold |
the intensity level of a stimulus at which one can detect the stimulus 50% of the time |
| |
difference threshold |
minimum difference between the intensity levels of two stimuli that we can detect 50% of the time |
| |
Weber's Law |
the difference threshold of two pairs of similar stimuli will be different in magnitude but will be equal in percentage |
| |
an application of Weber's Law |
you can tell the defference between a 4 pound barbell and a 6 pound barbell, but not between 50 and 52 pounders |
| |
photoreceptor |
a neuron that is sensitive to light |
| |
adaptation |
the reason we don't feel the weight of earrings all the time |
| |
rods |
enable us to see in very low light |
| |
cones |
come in red, green and blue models |
| |
iris |
the blue part of blue eyes |
| |
pupil |
it is a place, but not a thing |
| |
lens |
focuses light onto the retina |
| |
opponent process theory |
explains why some people are red-green color blind |
| |
retina |
contains the rods and cones |
| |
tympanic membrane |
also called an eardrum |
| |
visual cortex |
located in the occipital lobe |
| |
pinna |
the outside part of the ear |
| |
ossicles |
little bones in the middle ear |
| |
stirrup |
connects the anvil to the oval window |
| |
anvil |
connects the hammer to the stirrup |
| |
top-down |
refers to processing in which our experience and expectations influence our perceptions |
| |
bottom-up |
refers to visual processing in which experience does not influence perception |
| |
sensation |
the process of receiving information from the environment |
| |
perception |
selecting and interpreting information from the environment |
| Add or remove terms from this set |
