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Human Physiology, 7/e
Stuart I Fox, Pierce College
The Nervous System: Neurons and Synapses

Critical Thinking Exercises

Please answer all questions



1

Why is it possible to successfully vaccinate a person after a bite from a rabid dog? Most vaccines are only effective before the exposure to the germ.
2

Most anesthesias are fat-soluble. What does this suggest about the chemical nature of myelin?
3

Why would cholecystokinin (i.e. CCK), delivered to the brain be a great weight-control drug?
4

Why can't CCK be given orally to prevent obesity?
5

Viagratm is a drug used to promote erections in impotent men. What neurotransmitter do you think it would enhance?








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