Introduction to psychology

The main function of myelin is to

	form a protective coating over nerve axons.
	affect the speed of nerve impulses.
	block the reception of acetylcholine.
	aid a nerve's receptivity to neurotransmitters by increasing the number of receptor sites available.

	jumps the synapse similar to the way a spark jumps the gap in a sparkplug.
	causes the axon terminal to squirt out a chemical toward the next neuron.
	causes the axon terminal to expand and touch a receptor site.
	bursts open a gap in the wall of the next neuron's dendrite.