PHYSIOLOGY
CENTRAL NERVOUS SYSTEM
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Impulse transmission is fastest in neurons that are:
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myelinated
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unmyelinated
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sensory
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motor
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cerebral
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Explanation:
Detailed explanation-1: -By acting as an electrical insulator, myelin greatly speeds up action potential conduction (Figure 3.14). For example, whereas unmyelinated axon conduction velocities range from about 0.5 to 10 m/s, myelinated axons can conduct at velocities up to 150 m/s.
Detailed explanation-2: -Myelinated neuron are faster because The myelin sheath is a fatty layer made up of the hugely expanded plasma membrane of schwann cells which surround the axon of neurons.
Detailed explanation-3: -Abstract. Nerve impulses travel along myelinated axons as much as 300-fold faster than they do along unmyelinated axons.
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