The ARK (also spelled Ark) is a barrel attachment found in the Extinction maps Awakening and Exodus. It allows weapons to turn into a laser weapon, though it still uses conventional ammunition and also has the additional effect of causing extra damage to cryptids, which further makes any that are killed with the weapon it's attached to explode in a similar fashion as to the Pipe Bombs.
A kidney, ureter, and bladder (KUB) study is an X-ray study that allows your doctor to assess the organs of your urinary and gastrointestinal systems. Doctors can use it to help them diagnose urinary disorders and causes of abdominal pain.
Renal function, or kidney function, is a measure of how well the kidneys are filtering blood. If you have two fully-functioning kidneys, you have all of your renal function (100 percent). A majority of kidney diseases damage renal function by attacking little filtration units in the kidneys, called nephrons.enal function, or kidney function, is a measure of how well the kidneys are filtering blood. If you have two fully-functioning kidneys, you have all of your renal function (100 percent). A majority of kidney diseases damage renal function by attacking little filtration units in the kidneys, called nephrons.