BIOLOGICAL BASES OF BEHAVIOR
NEUROTRANSMISSION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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they contain insulating cells called Schwann cells
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they contain gaps called nodes of Ranvier
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action potentials move through a process called continuous propagation
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action potentials move more rapidly down myelinated neurons that unmyelinated neurons
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Detailed explanation-1: -The correct answer is c. An action potential, once started, cannot be stopped or negated. An action potential occurs on the “all-or-none principle". Only when a stimulus is strong enough, and the induced depolarization of the membrane reaches a threshold level, an action potential can be generated.
Detailed explanation-2: -The major difference between continuous propagation and saltatory propagation is A Continuous occurs In an unmyelinated axon while saltatory occurs In myelinated.
Detailed explanation-3: -In neuroscience, saltatory conduction (from Latin saltus ‘leap, jump’) is the propagation of action potentials along myelinated axons from one node of Ranvier to the next node, increasing the conduction velocity of action potentials.
Detailed explanation-4: -Continuous propagation occurs as follows: The membrane potential briefly becomes positive at the peak of the action potential. A local current develops as sodium ions begin moving in the cytoplasm and ECF. The local current spreads out in all directions, depolarizing the nearby membrane areas.