Review Part A The biochemistry that takes place inside cells depends on various elements, such as sodium, potassium, and calcium, that are dissolved in water as ions. These ions enter cells through narrow pores in the cell membrane known as ion channels. Each ion channel, which is formed from a How many potassium ions pass through if the ion channel opens for 1.0 ms? specialized protein molecule, is selective for one type of ion. Measurements with microelectrodes have shown that a 0.30-nm-diameter potassium ion (K* ) channel carries a current of 1.8 pA 1.13x104 ions Submit Previous Answers Correct Correct answer is shown. Your answer 11250 ions was either rounded differently or used a different number of significant figures than required for this part. Part B What is the current density in the ion channel? IVO AEd A/m2 Submit Request Answer Provide Feedback Next >