Action potentials travel swiftly down: axons with myelin and more slowly in axons without myelin.
The conduction velocity of the action potential is faster in myelinated axons, the nerve impulse generated by an action potential can propagate faster than it loses its strength due to the insulation that protects against signal loss. Similar to the insulation around wires in electrical systems, glial cells form a membrane sheath surrounding axons called myelin, insulating the axon. This myelination, as it is called, can greatly increase the speed of signals transmitted between neurons. The action potential travels down the axon as a result of sodium influx depolarizing near-threshold segments of the axon. A voltage change that reaches a threshold value causes voltage-gated sodium channels in the axonal membrane to open.
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The spindle gradually lenghtens during prophase.Towards the end of the prophase stage,the nuclear envelopes break down,and each of the microtubules reach from each cell pole to the cell's equator an
Answer:There are three mechanisms of horizontal gene transfer typically used by bacteria: transformation, transduction, and conjugation. Transformation allows for competent cells to take up naked DNA, released from other cells on their death, into their cytoplasm, where it may recombine with the host genome.
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