Undulipodia function in moving the cell, the organism to which the cell belongs, or fluid in contact with the cell. The internal surface (lumen) of the human ureter is star-shaped (see figure). The tube leading urine from the bladder to the exterior of the body. The ultimate product of nucleic acid catabolism; main nitrogenous component of urine in birds and reptiles.
PICTURE1 | PICTURE 2 ulnocarpal /ƏL-nō-CARP-əl/ adj. Where the undulipodium attaches to the cell there is a basal body called the kinetosome which is connected to the axoneme with motor proteins. MOLECULAR STRUCTURE urea cycle See: ornithine cycle. Either of the tubes leading from the kidneys to the bladder.
Processes, such as plate tectonics, are what shapes the face of the Earth.The term is also used more generally to characterize any type of exponential or non-exponential decay.For example, the medical sciences refer to the biological half-life of drugs and other chemicals in the human body. The original term, half-life period, dating to Ernest Rutherford's discovery of the principle in 1907, was shortened to half-life in the early 1950s.Rutherford applied the principle of a radioactive element's half-life to studies of age determination of rocks by measuring the decay period of radium to lead-206.Half-life is constant over the lifetime of an exponentially decaying quantity, and it is a characteristic unit for the exponential decay equation.