Electrolysis Practice Exam

What effect does the reaction at the cathode have on the nerves?

1. Irritates nerves

2. Relaxes nerves

3. Inhibits nerve growth

4. Strengthens nerve connections

The correct answer is: Irritates nerves

The cathode reaction in electrolysis typically involves the reduction of cations in solution, which can produce substances that may influence nerve activity. When ions are reduced at the cathode, various electrochemical changes occur which could lead to the generation of gaseous products, such as hydrogen. The release of these gases might create a localized change in chemistry that can irritate sensory nerve endings. This irritation can manifest as tingling sensations or discomfort in the surrounding tissues. The other possible effects listed don't align with the typical outcomes of cathodic reactions. Relaxation of nerves usually requires inhibitory neurotransmitters or the absence of stimulating signaling, which isn't associated with the typical reactions occurring at the cathode. Inhibiting nerve growth or strengthening nerve connections implies a more complex biological process that isn't a direct consequence of the electrochemical conditions maintained at the cathode. Thus, the most appropriate choice that reflects the reaction's effect on nerves is irritation.