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Smallest physical difference between 2 stimuli that can still be recognized as a difference
Layer at the back of the eye that contains rods and cones; converts light energy to neural responses
The way the eye works
Rays of light entering your eye are bent first by the curved transparent cornea, pass through the liquid aqueous humor and the hole through your muscular iris called the pupil, are further bent by the lens, and pass through your transparent vitreous humor before focusing on the rods and cones in the back of your eye
Theory stating that 3 types of color receptors produce the primary color sensations of red, green and blue
Inability to see certain wavelengths of color; most common form is red and green; most common in males
How hearing works
Your outer ear channels sound waves to the eardrum that vibrates with the sound waves. This causes the middle ear bones to vibrate. The vibrating stirrup pushes against the oval window of the cochlea. Inside the cochlea is the basilar membrane with hair cells that are bent by the vibrations and transduce this mechanical energy to the electromechanical energy of neural impulses. Hair cells synapse with auditory neurons whose axons from the auditory nerve. The auditory nerve transmits sound messages through your medulla, pons, and thalamus to the auditory cortex of the temporal lobes.
Sense that tells how one's own body is oriented in the world with respect to gravity
Provides constant sensory feedback about what the body is doing during motor activities
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