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

1. Sodium ions	2. Potassium ions
3. Uric acid	4. Hydrogen ions

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

The functional unit of the human kidney is the:

The vascular endothelium of glomerular capillaries, basement membrane, and podocytes in the inner lining of Bowman’s capsule form:

A series of straight capillaries in the medulla that lie parallel to the loop of Henle are called:

About what percent of the glomerular ultrafiltrate is reabsorbed by the tubules during urine formation?

The part of the nephron where both hydrogen and potassium ions are secreted into the tubular fluid is the

The hormone produced by the adrenal cortex, when stimulated by angiotensin II, that causes increased sodium and water reabsorption in the distal convoluted tubules, is:

Which area actually secretes renin into the blood?