Glomerular ultrafiltrate normally does not contain:

1. formed elements of the blood	2. glucose
3. amino acids	4. electrolytes

The urine concentrating ability of mammals and birds is correlated with the length of their:

The part of the nephron that is least permeable to water is the:
1. ascending limb of the loop of Henle
2. descending limb of the loop of Henle
3. collecting duct
4. proximal convoluted tubule

Urea in humans is synthesized in:

The most toxic nitrogenous metabolic waste product is:

Malpighian body or the renal corpuscle is made up of:
1. Glomerular capillaries and PTCN
2. Bowman's capsule and renal tubules
3. Afferent and efferent arterioles
4. Glomerular capillaries and Bowman's capsule

Filtration slits in the glomerular membrane are formed by:
1. The capillary endothelial cells
2. The basement membrane
3. The podocyte cells
4. Mesangial cells

All the following are secreted by the tubules of nephrons except:

A hormone formed in the blood that causes vasoconstriction is:

In the male, urethra serves to:
1. transport urine from kidney to bladder
2. transport sperms to ejaculatory ducts
3. store urine and sperms
4. discharge semen and urine