While walking down the street you step on something, which turns out to be a wallet. What sequence of components of the nervous system was involved as you realized that you stepped on something and then picked it up?
a) brain, afferent nerves, efferent nerves
b) afferent nerves, brain, efferent nerves
c) efferent nerves, spinal cord, afferent nerves
d) spinal cord, efferent nerves, afferent nerves
ANS: b
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