Marcus is excited to be working in the laboratory of Dr. Flores, an expert on electrical signaling in neurons. However, he is surprised to learn that the research is done on squid axons placed in sea water. He asks Dr. Flores the reasons for this. Which of the following is NOT one of the reasons that Dr. Flores provides?
a. A recording electrode can be inserted into a squid axon without disrupting its function.
b. The readings from inside the axon can be compared to the readings from the surrounding seawater.
c. Squid axons are myelinated, increasing the speed of propagation of an action potential.
d. Squid axons can be as great as 1 millimeter in diameter and are visible to the naked eye
Question 2
Juan, a graduate student in an electrophysiology lab, stimulates an isolated neuron grown in a petri dish and measures its action potential. How will the neuron respond to the firing of the action potential?
a. Its dendrites will retract.
b. Its dendrites will extend.
c. It will take up chemical messengers.
d. It will release chemical messengers.
Electrical and chemical gradients.
Electrocardiography. (a) Electrodes are placed on the patient’s chest to record the electrical event
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