The eye’s photoreceptor cells come in two varieties:_______, which function in low- light situations but provide only _______ vision; and ______, which respond best to bright light but that provide.________ vision.
Adv.
Visual information is passed from the eyes to the brain via our two_______.
Taste cells are part of organized collections of 50 to 100 cells known as _______. Taste works by means of “tastants” interacting with hair-like projections that extend from the_______.
Sound waves are collections of air molecules that are either more or less _______ than molecules of ambient air.
The inner ear’s cochlea is filled with _______; its vibrations open and shut “trapdoor” channels on _______ cells, thus resulting in the transmission of a nerve signal.
Each of our senses employs the cells known as _______, which can both respond to stimulation and transform their responses into _______.
All senses except _______ route their signals through the brain’s______, after which these signals go to differing parts of the _______ for additional processing.
The 340 to 380 types of olfactory receptors we have allow us to discriminate among a much greater number of smells because the various receptor types can send signals in different _______.
The spinal cord can receive input from _______and direct ________ in response, without input from the brain. This entire process is known as a_______.
The autonomic nervous system is divided into the sympathetic or “_______” division and the parasympathetic or “_______” division.
The portion of the brain that is the site of our highest thinking and processing, the _______, is the outer portion of the brain’s _______.
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