Ch. 3 Psychology
Terms in this set (30)
ransparent, protective cover, (focuses light into the pupil)
Bends light rays inward, directing it through the pupil
a ring of muscle tissue that forms the colored portion of the eye around the pupil and controls the size of the pupil opening
By about age 40, the lens loses its ability to change its shape to accommodate for near vision "old eye
when the lens focuses images of distant objects in front of rather than on the retina. Near objects are clear, but far ones are blurry.
occurs when the lens focuses objects behind, rather than on the retina. Far objects are clear, but close objects are blurry.
It has no rods but about 30,000 cones packed tightly together. It provides the clearest sharpest vision in the whole retina.
color vision; 6 million cones in each retina.
retinal receptors that detect black, white, and gray; necessary to see in low light
120 million rods,
Stare at a color and then stare at a white object.The negative will remain
The inability to distinguish certain colors from another; More common in males
Can't see any color (all gray)
the process by which the eye's lens changes shape to focus near or far objects on the retina
the light-sensitive inner surface of the eye, containing the receptor rods and cones plus layers of neurons that begin the processing of visual information
Thomas Young; There are 3 kinds of cones in the retina that respond to blue, green, and red
Ewald Hering in 1878; 3 kinds of cells respond by increasing and decreasing their rate of firing when different colors are present.
The job of the optic nerve is to transfer visual information from the retina to the vision centers of the brain via electrical impulses.
Range humans can hear
20 Hz to 20,000 Hz
the area that sound waves pass through to reach the eardrum; lined with hair
the chamber between the eardrum and cochlea containing the hammer, anvil, and stirrup that concentrate the vibrations of the eardrum on the cochlea's oval window
a coiled, bony, fluid-filled tube in the inner ear through which sound waves trigger nerve impulses;
Conductive hearing loss
damage to the eardrum (prevents sound from hitting the cochlea) can be cured with hearing aids
sensorineural hearing loss
hearing loss caused by damage to the cochlea's receptor cells or to the auditory nerves; also called nerve deafness
a thin layer of tissue, within the nasal cavity, that contains the receptors for smell
-Last about 2 months
-Come into direct contact with sensory stimuli and reach directly into the brain
-Sends to the thalamus
Why do we feel pain?
1-Motivates us to tend to injuries
3-Seek medical help
4-Teaches us to avoid pain-producing situations
Taste buds lifespan