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We have approximately 1,000 types of odor receptor cells and it is estimated that we can detect
10,000 different odors.
Thousands of nerve endings in the skin respond to four basic sensations: Pressure, hot, cold, and
pain, but only the sensation of pressure has its own specialized receptors. The ability to keep
track of where the body is moving is provided by the vestibular system.
Perception involves the processes of sensory interaction, selective attention, sensory adaptation,
and perceptual constancy.
Although our perception is very accurate, it is not perfect. Our expectations and emotions color
our perceptions and may result in illusions.