Figure 2. The current–voltage relationship for total and nifedipine-sensitive Ca²⁺ currents in MNCs isolated from control and dehydrated rats.

Cells were stepped from a holding potential of −80 mV to the indicated potentials in the absence and presence of 10 μm nifedipine. A, the current–voltage relationship of peak Ca²⁺ currents evoked by stepping to the indicated voltages in control (○; n = 27) and dehydrated rats (•; n = 31). B, the current–voltage relationship of nifedipine-sensitive Ca²⁺ currents evoked by stepping to the indicated voltages in control (○; n = 27) and dehydrated rats (•; n = 31).