Marcus,who Works in the Laboratory of Dr

Multiple Choice

Marcus,who works in the laboratory of Dr.Flores,a prominent electrophysiologist,takes readings with a recording electrode placed within a squid axon.He reports to Dr.Flores that the cell is firing an action potential.What measurement did Marcus take with the recording electrode?

A) −70 mV
B) 0 mV
C) +40 mV
D) +70 mV