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Review:
Campbell 1024-1025: Self-quiz 3, 4, 7, 8; Challenge questions 1-3 pp. 154-155, exocytosis

1. Explain how synapses allow neurons to act as integrators of information. 2. Why is an action potential "all-or-none"?

Review questions
Q. What would be the effect on pain sensors if you treated them with a drug that blocks the openning of Na+ channels?