Marcus is conducting a squid axon electrophysiology experiment with Dr. Flores. While monitoring a recording electrode placed within a squid axon, Marcus reports to Dr. Flores that the neuron is in a refractory period. What does this mean?
a. The cell is hyperpolarized and another action potential is unlikely or impossible.
b. The cell is depolarized and cannot fire another action potential.
c. The cell is hyperpolarized and is getting ready to fire a larger action potential.
d. The cell is depolarized and is getting ready to fire a larger action potential.
Question 2
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
Squid
A Schematic Description of the Experiment by Misanin, Miller, and Lewis (1968)
Dead Weight Testers Experiment
Summary of the Hershey–Chase experiment demonstrating that DNA, and not protein
Cephalopod (squid), with tentacles
Miller's Experiment