1.8inches to cm

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This conversion of 1.45 meters to inches has been calculated by multiplying 1.45 meters by 39.3700 and the result is 57.0866 inches.

1.8inches actual size

C-type dorsal root ganglion (DRG) neurons can generate tetrodotoxin-resistant (TTX-R) sodium-dependent action potentials. However, multiple sodium channels are expressed in these neurons, and the molecular identity of the TTX-R sodium channels that contribute to action potential production in these neurons has not been established. In this study, we used current-clamp recordings to compare action potential electrogenesis in Na(v)1.8 (+/+) and (-/-) small DRG neurons maintained for 2-8 h in vitro to examine the role of sodium channel Na(v)1.8 (alpha-SNS) in action potential electrogenesis. Although there was no significant difference in resting membrane potential, input resistance, current threshold, or voltage threshold in Na(v)1.8 (+/+) and (-/-) DRG neurons, there were significant differences in action potential electrogenesis. Most Na(v)1.8 (+/+) neurons generate all-or-none action potentials, whereas most of Na(v)1.8 (-/-) neurons produce smaller graded responses. The peak of the response was significantly reduced in Na(v)1.8 (-/-) neurons [31.5 +/- 2.2 (SE) mV] compared with Na(v)1.8 (+/+) neurons (55.0 +/- 4.3 mV). The maximum rise slope was 84.7 +/- 11.2 mV/ms in Na(v)1.8 (+/+) neurons, significantly faster than in Na(v)1.8 (-/-) neurons where it was 47.2 +/- 1.3 mV/ms. Calculations based on the action potential overshoot in Na(v)1.8 (+/+) and (-/-) neurons, following blockade of Ca(2+) currents, indicate that Na(v)1.8 contributes a substantial fraction (80-90%) of the inward membrane current that flows during the rising phase of the action potential. We found that fast TTX-sensitive Na(+) channels can produce all-or-none action potentials in some Na(v)1.8 (-/-) neurons but, presumably as a result of steady-state inactivation of these channels, electrogenesis in Na(v)1.8 (-/-) neurons is more sensitive to membrane depolarization than in Na(v)1.8 (+/+) neurons, and, in the absence of Na(v)1.8, is attenuated with even modest depolarization. These observations indicate that Na(v)1.8 contributes substantially to action potential electrogenesis in C-type DRG neurons.

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