Some diseases disrupt the nervous system , which throws the body out of balance and have health consequences. What is an example of such a disease that disrupts part of the nervous system? How does it work?
Plants have mechanisms with similarities and differences with those of animals for maintaining homeostasis. How are plants and animals similar and different in regards to homeostasis?
Explain how nerve cells have electrical properties. As an example, how is membrane potential generated?
How is an action potential generated in a neuron?
How is an action potential propagated along axons in the nervous system?
How are action potentials propagated between synapses of different neurons?
What does a drug like cocaine or crystal meth do to your synapses?
What are the major parts of the nervous system and what are their functions?

CHOOSE ONE QUESTION

Now you should have your results, at least for the seed germination experiments.

What aspects of the experimental design of the seed germination experiments could be sources of error? How would you re-design the experiment to remove these sources of error?
What aspects of the experimental design of the gravitropism experiments could be sources of error? How would you re-design the experiment to remove these sources of error?
Look up the type of light from the visible spectrum that plants utilize for photosynthesis in “How Life Works” or elsewhere. Consider the following facts. Do any of these facts cause you to revise your initial hypothesis or explain any of the observations you have made during your experiments? Explain your answer.
Red light is of longer wavelength than blue and is much better at penetrating the soil
Blue light is able to penetrate snow cover, whereas red light is not
Germination does not require an external energy source, but normal growth after germination does depend on light for photosynthesis.
Were there any experimental results from either experiment that surprised you? How might an experimental plant biologist deal with surprising/unexpected results?
Can you think of a different experiment with lettuce seeds/seedlings that you could conduct with the materials in your lab kits? If so, what would your hypothesis and experimental predictions be?