Most of the nephron is permeable to urea except for the cortical portion of the distal tubule. As the filtrate descends into the medulla, urea diffuses into the loop of Henle down its concentration gradient, causing the urea concentration in the tubule to rise.he loop of Henle. The loop of Henle is the portion of the kidney that creates the conditions by which the kidney can form concentrated urine (i.e. urine with an osmolality greater than plasma) later on in the nephron.
Battery Voltage : Normally a charged cell in rest is around 2.1 Volts which yields in 12.6 Volts for a charged battery at rest. When the battery is being charged by the car alternator the voltage will vary usually between 14 and 14.4 Volts.
Electric cars can use AC or DC motors: If the motor is a DC motor, then it may run on anything from 96 to 192 volts. If it is an AC motor, then it probably is a three-phase AC motor running at 240 volts AC with a 300 volt battery pack.