Introduction to psychology

The effect of mind-altering drugs may be a result of their

	toxic effects on sensitive neural tissues.
	ability to lower neural thresholds in brain tissue.
	ability to imitate or block neurotransmitters.
	stimulation of enkephalin production in regulator.

	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.