The urine concentrating ability of mammals and birds is correlated with the length of their:
1. | ureters | 2. | proximal convoluted tubules |
3. | distal convoluted tubules | 4. | loops of Henle |
1. | 1200, 300 | 2. | 300, 1200 |
3. | 300, 600 | 4. | 600, 300 |
What acts as a check on the renin-angiotensin mechanism?
1. | ANF | 2. | ADH |
3. | Aldosterone | 4. | Erythropoietin |