Conduction

I think the second question is referring to thicker axons having nodes of Ranvier and thus can perform saltatory conduction. This would decrease the need for Na+ channels. The answer to the first question sounds pretty reasonable.

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Except for decreasing the heart rate and the force of contraction, PNS also reduces the conduction velocity of cardiac muscle fibers. Parasympathetic stimulation can also result in increased activity by glands that control bronchial secretions.

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... The "defrost" option on a microwave oven relies on intermittent heating of a small amount of liquid water present on the food, and heat conduction from these areas into frozen material. By putting frozen material into the microwave oven with continuous energy input, no time is given ...

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... of: veins, capillaries, venules, arteries, or the coronary sinus? 3) The myocardium does not contain which of the following: intercalated discs, conduction (Purkinje) fibers, sarcomeres, visceral pericardium, trabeculae carne I am pulling my hair out with these three. I will try to get the multiple ...

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The gates are concentrated at the nodes of ranvier. it's called saltatory conduction. here: http://en.wikipedia.org/wiki/Saltatory_conduction

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