ABCD use the top key to answer part D
d). For the following conditions, circle which EPP is most likely to occur. (A = normal, B = bigger than normal, C = smaller than normal, D = no EPP occurs)
Stimulator X depolarizes the axon by 10 mV
B C D
Stimulator X depolarizes the axon by 20 mV
A B D
Stimulator X depolarizes the axon by 40 mV
A B C D
e). Some drugs were tested for their effects on the EPP. For each drug, circle which EPP is most likely to occur. Assume that Stimulator X depolarized the axon by 20 mV after each drug below was added and each drug was tested by itself. Drug blocking all types of voltage-gated Na+ channels was applied to the nerve only A B C D Drug blocking all types of voltage-gated Na+ channels was applied to the muscle only A B C D Drug blocking all types of voltage-gated Ca+ channels was applied to the nerve only A B C D Drug blocking all types of voltage-gated Ca+ channels was applied to the muscle only A B C D Drug inhibiting the enzyme that breaks down the neurotransmitter was applied to the synapse A B C D