The resting potential of an axon results from the fact that an axon membrane is: (2 points)

encased by a myelin sheath

selectively permeable

sensitive to neurotransmitter molecules

part of a larger neural network

depolarized

Agroup of engineering students from purdue university reported that its licking machine, modeled after a human tongue, took an average of 364 licks to get to the center of a tootsie pop. twenty of the group's volunteers assumed the licking challenge-unassisted by machinery-and averaged 252 licks each to the center.