Therefore, whenever a ddNTP is added to a growing DNA strand, it is unable to chemically bind with the next nucleotide in the chain, and the DNA strand stops growing. Figure 3: By adding together information about all of the truncated strands, researchers can determine the nucleotide sequence of the DNA target.
Functions of the Bladder. Temporary store of urine â The bladder is a hollow organ. The walls are very distensible, with a folded internal lining (known as rugae), this allows it to hold up to 600ml. Assists in the expulsion of urine â During voiding, the musculature of the bladder contracts, and the sphincters relax.
Of course, the wall of the bladder has several layers of cells of different tissue types, of which the transitional cell epithelium is the innermost or most superficial relative to its urinary surface. Deep to this layer is a layer of muscle cells, which make up the muscular layer of the bladder wall.ts function is to collect and store the urine that has been made in the kidneys. Each side of the bladder is pierced by the small tubular ureter, which constantly transports the urine from each kidney. The base of the bladder opens into the urethra, much like a drain at the base of a sink.