What ions in sweat contribute to lowering skin resistance?

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Study for the Con Edison Basic Electric Test. Prepare with flashcards and multiple choice questions, each question has hints and explanations. Get ready for your exam!

Multiple Choice

What ions in sweat contribute to lowering skin resistance?

Explanation:
Sweat lowers skin resistance because it brings electrolytes to the skin surface. The key players are sodium and chloride ions. When sweat sits on the skin, sodium ions (positive) and chloride ions (negative) dissolve in the sweat film and form a mobile charge carrier network. This ionic conduction provides a path for electric current to move across the skin, reducing its impedance. Other ions like potassium, magnesium, and calcium are present too, but in smaller amounts, so their impact on conductivity is much less. In short, the dominant conduction comes from sodium and chloride in sweat.

Sweat lowers skin resistance because it brings electrolytes to the skin surface. The key players are sodium and chloride ions. When sweat sits on the skin, sodium ions (positive) and chloride ions (negative) dissolve in the sweat film and form a mobile charge carrier network. This ionic conduction provides a path for electric current to move across the skin, reducing its impedance. Other ions like potassium, magnesium, and calcium are present too, but in smaller amounts, so their impact on conductivity is much less. In short, the dominant conduction comes from sodium and chloride in sweat.

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