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Name: ___________________________ Neurotoxins and the Neuromuscular Junction In class: Label the parts of the neuron: dendrites, cell body and axon. Circle the part of the neuron that sends a signal to a muscle cell. Label this part. How do neurons signal to muscles? List 3 facts about each neurotoxin. (How are they the same? How are they different?) Coral Snake Venom Black Widow Spider Venom 1 Name: ___________________________ After class: Today we learned about the neuromuscular junction. Let’s see what you remembered. In the drawing, color the neuron’s , the , and the different colors. Circle the synapses. How many are there? What is this special type of synapse called? What neurotransmitter does the neuron use to signal to the muscle? Thinking question: You are a neuroscientist studying the neuromuscular junction and you want to study the effects of neurotransmitters on different types of cells. You know which neurotransmitter is used at the synapse between neurons and muscles, and you have a bottle of that molecule. What would happen if you added the neurotransmitter to neurons only? What would happen if you add the neurotransmitter to muscle cells? Now you decide to test the effect of coral snake venom on these experiments. If you add coral snake venom to the neurons, then add neurotransmitter, what, if anything, happens? Is it the same result as the first experiment on neurons? Now you add coral snake venom to your muscle cells. Then, you add neurotransmitter. What, if anything, happens? Is it the same result as the first experiment on muscle cells? 2