Arrector pili muscles are attached to the hairs in your skin

Which reaction occurs at the platinum cathode of the Clark electrode?

a. CO2 + H2O ? H2CO3 ? H+ + HCO3– b. AgCl + KCl ? Ag2 + Cl2 + K c. O2 + 2H2O + 4e– ? 4OH– d. 4Ag ? 4Ag+ + 4e–

One potential disadvantage of an automated identification system is

A) the cost. B) a lack of specificity. C) a lack of rapid turnaround. D) the need for extensive training.