Final answer:
A scanty amount of urine is referred to as oliguria, which occurs when urine output is less than 600 ml per day. This condition can be indicative of several health issues, including dehydration and renal disease.
Step-by-step explanation:
A scanty amount of urine, which is defined as the excretion of less than 600 ml per day, is known as oliguria. This condition can be caused by various factors such as fever, shock, vomiting, or diarrhoea. It indicates that the kidneys are not producing a sufficient volume of urine, which may be due to conditions like severe dehydration or renal disease. Contrastingly, anuria is a condition where there is virtually no urine output, specifically less than 10 ml per day, and it is observed in cases of acute renal failure and nephritis. When the excretion of urine exceeds 2500 ml per day, the condition is referred to as polyuria, which can occur in diabetes insipidus or diabetes mellitus. Glycosuria involves the presence of glucose in the urine and is primarily associated with uncontrolled diabetes, where blood glucose levels exceed the kidney's reabsorption capacity.