The vestibular sense lets you know when ().
A. a signal is present
B. a figure is perceived against a ground
C. you are walking upright
D. you have a subliminal perception
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The three ascending steps of conscious experience are________.
Sensation refers to the_______.
If light is looked upon as a stream of particles, or quanta, what are the particles called?________
A unique property of an electromagnetic wave is its ability to travel through________.