squid axons are myelinated, increasing the speed of propagation of an action potential.
Explanation:
The myelin sheath is a layer on each nerve cell. This mainly has two functions:
The myelin sheath has disjointed segments. These segments cause the action potential to jump from one segment to another. If the myelin sheath was not present then the action potential would not be able to travel the entire length of the nerve cell.
It acts as a protective layer of the nerve cell.
Placing the squid on water should not have any effect on the speed at which the action potential travels through the nerve cell.
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