HISTOLOGY
NERVOUS TISSUE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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produce neurotransmitters
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generate ATP for use during conduction of action potentials
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store glycogen for energy production during impulse conduction
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provide electrical insulation to help increase the speed of impulse conduction
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Detailed explanation-1: -The myelin sheath has three functions: Its fatty-protein coating provides protective insulation for your nerve cell, like the plastic insulation covering that encases the wires of an electrical cord. It allows the electrical impulses to travel quickly and efficiently between one nerve cell and the next.
Detailed explanation-2: -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-3: -The long, myelin-covered section of axon between nodes is the internode. The purpose of the myelin sheath is to increase the speed of transmission by acting as an electrical insulator. In non-myelinated axons, the action potential must propagate continuously along the plasma membrane.
Detailed explanation-4: -The main function of myelin is to protect and insulate these axons and enhance the transmission of electrical impulses. If myelin is damaged, the transmission of these impulses is slowed down, which is seen in severe neurological conditions such as multiple sclerosis (MS).