Each nephron is composed of an initial filtering component (the  renal corpuscle) and a tubule specialized for reabsorption and secretion (the renal tubule). The renal corpuscle filters out large solutes from the blood, delivering water and small solutes to the renal tubule for modification.unctionally, cortical and juxtamedullary nephrons have distinct roles. Cortical nephrons (85% of all nephrons in humans) mainly perform excretory and regulatory functions, while juxtamedullary nephrons (15% of nephrons in humans) concentrate and dilute urine.
A car cigarette lighter uses 12 volts direct current. Car electrical systems use 12 volts direct current verses the 120 volt alternating current use in most household situatioâ¦ns.
1 You have a 12 volt portable radio and cassette player that has a label on the back that says 12 volts, 0.2 amps. 2  You don't need to calculate anything for this as the current draw is already given in amps at 12 volts. 3  You want to use a 12 volt 20 watt light bulb. Multiply the amps by the hours and you get the result of 1.2 amp-hours per day. 2  You use three 20 watt 12 volt lights for about four hours each night. 3  The power consumption for each light we worked out earlier to be 1.67 amps. 4  So for three lights we calculate a current draw of 5 amps.