Difference between glycosuria and ketonuria is as follows

Glycosuria	Ketonuria
The presence of glucose in urine is known as glycosuria. It occurs in diabetes mallitus.	Presence of abnormally high ketone bodies in urine is termed as ketonuria. Increase ketones in urine usually occurs at the time of longtime fasting.

Sebaceous glands are involved in the elimination of certain substances like cholesterol, squalene, triglycerides wax and esetrs through sebum. This secretion provides oily covering to the skin.

The substances that are actively transported in the glomerular filtrate are glucose and amino acids.

Metabolic disorders that can be diagnosed by analysis of urine are

(i) Hematuria It is the presence of blood or blood cells in the urine, which could be a sign of kidney stone or a tumor in urinary tract.

(ii) Albuminuria It is the presence of albumin in urine and occurs in nephritis i.e., inflammation of glomeruli. In this condition the size of filtering slits becomes enlarged.

Urine formation includes glomerular filteration (ultra filteration), selective reabsorption and tubular secretion that takes place in different parts of the nephron.

Glomerular filteration involves the filteration of blood, which is carried out by glomerulus. Selective reabsorption is the absorption of filtrate through renal tubules either actively or passively.

Tubular secretion involves secretion through tubular cells in urine in order to maintain ionic and acid-base balance of body fluids.