Glomerulonephritis is a type of kidney disease and causes swelling, abnormal urine, fever, achiness, and more. Gonorrhea is an sexually transmitted diseases and can cause painful urination and penile discharge. Interstitial cystitis is a condition that causes pain in the bladder or pelvic area, and frequent urination.
From Wikipedia, the free encyclopedia. A futile cycle, also known as a substrate cycle, occurs when two metabolic pathways run simultaneously in opposite directions and have no overall effect other than to dissipate energy in the form of heat.
Definition of cycle for Students. 1  1 : a period of time taken up by a series of events or actions that repeat themselves again and again in the same order the cycle of the seasons. 2  2 : a complete round or series The dishwasher started its drying cycle. 3  3 : 1bicycle. 4  4 : motorcycle.