If we were to give the worm a stimulus pulse with a very low

If we were to give the worm a stimulus pulse with a very low voltage (slightly above threshold) but a long duration could we get the same response with a higher voltage but a shorter duration? (Explain your response remembering that we are NOT stimulating a single neuron.)

Solution

If connected to convential amplifier with low input resistance, there would be large drop acroos microelectrode and amplifier measures small portion of true potential .   To stimulating single neuron , micromanipulators must be used to precisely insert an electrode into brain.