Georgio is jogging barefoot along the beach when he suddenly steps on the sharp edge of a broken shell. He instantly feels pain due to the message carried to his brain by ____. He then slowly walks home with an achy foot. The message of the ache is carried by ____.
a. myelinated axons; unmyelinated axons
b. myelinated dendrites; unmyelinated axons
c. unmyelinated dendrites; myelinated axons
d. unmyelinated axons; myelinated axons
Question 2
Myelin, which insulates many neuronal axons, is formed by ____.
a. synaptic coatings
b. blood vessel extensions
c. dendritic ensheathings
d. glial membranes
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