Critical Thinking Activities - Chapter 9

  1. If a person has been nerve gassed (i.e. exposed to one of the anticholinesterases), one symptom of the condition may be pin-point pupils. Please explain.

  2. Angry people can often be seen to have very dilated pupils. Why?

  3. The tobacco plant produces nicotine, several giant toadstools produce muscarine, and certain nerve gases (originally produced to kill people) are used as insecticides: what do all of these facts tell us about an insects neurons?

  4. You were in an accident and experienced thoracic trauma, you then recovered but still had a "runaway heart" (i.e. tachycardia). If the cause of the tachycardia is due to a nerve being severed, which type of nerve would it be?

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