Activity Sheet 5 Circulation and the effect of Caffeine and Nicotine.docx

Activity Sheet 5 Circulation and the effect of Caffeine and Nicotine.docx

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Activity Sheet 5 Circulation and the effect of Caffeine and Nicotine Read Chapter 18. This lab investigates the effect of two compounds on the pulsation  rate of the circulatory system in the freshwater annelid  Lumbriculus variegates . 1. What two compounds are tested in this experiment? Caffeine and nicotine 2. Describe the organism used in this experiment. Why was that species chosen for  this experiment? We used a freshwater blackworm. This species was chosen because it’s easily  cultured and semi-transparent. 3. What type of compound is caffeine? Stimulant 4. What effects does caffeine have on the nervous system of an animal? It lowers the threshold necessary to stimulate an action potential in neurons,  causing the neurons to fire with a smaller stimulus than they would normally 
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  • Fall '19
  • NoProfessor
  • stimulant

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