There is no radioactive source in or near the chamber, and the room where this video was taken has very low radon levels and very low levels of radioactive materials in the building -- most of the tracks seen are from cosmic rays. This video was recorded in Colorado; how would the video differ if it had been recorded in Boston or another sea level location

Cells in the nervous system have a potential difference of 70 mv across the cell membrane separating the interior of the cell from the extracellular fluid. this potential difference is maintained by ion pumps that move charged ions across the membrane. is this an emf? select the correct answer and explanation. 1)no. the ion pumps cannot separate charges; thus, they cannot create a potential difference. 2)yes. the ion pumps cannot separate charges, but they still can create a potential difference. 3)yes. the ion pumps can actively separate charge; thus, they can create a potential difference. 4)no. the ion pumps can separate charges, but they cannot create a potential difference.