Vision
The adjustable opening in the center of the eye through which light enters.
Pupil
A visual sensation that remains after a stimulus is withdrawn
Afterimage
A unit of measurement for the loudness of sounds.
Decibel
The sense of smell
Olfaction
Structures in many of the tongue's papillae that are composed of 60 to 100 receptor cells for taste.
Taste Buds
The transparent structure behind the pupil that changes shape to help focus images on the retina
Lens
The dimension of light that refers to the specific color perceived.
Hue
Height of a wave; influences brightness in visual perception and volume in audition
Amplitude
Two matchstick-sized structures above the nasal cavities, where smell sensations first register in the brain.
Olfactory Bulbs
The sense of taste.
Gustation
The nerve that carries neural impulses from the eye to the brain
Optic Nerve
The purity of a color, or the degree to which the light waves producing it are of the same wavelength.
Saturation
The distinctive quality of a sound that distinguishes it from other sounds of the same pitch and loudness.
Timbre
Chemicals excreted by humans and other animals that can have a powerful effect on the behavior of other members of the same species.
Pheromones
This is the fifth taste sensation, after sweet, salty, sour, and bitter.
Umami
The central focal point in the retina, around which the eye's cones cluster
Fovea
The theory of color vision suggesting that there are three types of cones in the retina that make a maximal chemical response to one of three colors - red, green, or blue
Trichromatic Theory
The number of cycles completed by a sound wave in one second, determining the pitch of the sound; measured in the unit called the hertz.
Frequency
Two 1-square-inch patches of tissue, one at the top of each nasal cavity, which together contain about 10 million olfactory neurons.
Olfactory Epithelium
Supertasters
Retinal receptors that detect black, white, and gray; necessary for peripheral and twilight vision, when cones don't respond
Rods
Theory of color vision suggesting that three kinds of cells respond by increasing or decreasing their rate of firing when different colors are present.
Opponent-Process Theory
The oddly shaped, curved flap of cartilage and skin on the visible part of the outer ear.
Pinna
The amount of odor receptors contained in the olfactory neurons.
1,000
This 2 word answer is linked to food preferences, but not to how these preferences may be connected to nutritional status.