If Gertrude walks every day at 2:00 pm, she is . avoiding sports with excessive contact
developing a habit
trying to make up for the lost time
taking time to cool-down after exercise

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.

Positive ions differ from neutral atoms in that

What would be the net charge of 1 gram gold piece after removal of 1% of its electrons