During cataphoresis, entry of an acidic solution into the skin is facilitated by which electrode polarity?

During cataphoresis, entry of an acidic solution into the skin is facilitated by which electrode polarity?

• A. Negative pole
• B. Positive pole
• C. Both poles
• D. Neither

Answer: (B)

Cataphoresis uses an electric field to move ions from a solution into the skin. An acidic solution contains positively charged ions, and placing the positive electrode (anode) near the treatment area leads to oxidation at the electrode that releases hydrogen ions, making the local environment more acidic. This acid-rich region facilitates the penetration of the acidic ions into the skin under the influence of the current. If the negative pole were used, hydroxide would be produced, creating an alkaline environment and hindering acid entry. So the positive pole best facilitates the entry of an acidic solution into the skin.

Cataphoresis uses an electric field to move ions from a solution into the skin. An acidic solution contains positively charged ions, and placing the positive electrode (anode) near the treatment area leads to oxidation at the electrode that releases hydrogen ions, making the local environment more acidic. This acid-rich region facilitates the penetration of the acidic ions into the skin under the influence of the current. If the negative pole were used, hydroxide would be produced, creating an alkaline environment and hindering acid entry. So the positive pole best facilitates the entry of an acidic solution into the skin.