I: | Hepatic portal system |
II: | Renal portal system |
The excretory product eliminated by a frog is:
1. | Ammonia | 2. | Urea |
3. | Uric acid | 4. | Creatine |
The excretory system of a frog consists of all of the following, except:
1. | a pair of kidneys | 2. | a pair of urethra |
3. | a single median cloaca | 4. | urinary bladder |
How many of the given statements regarding the anatomy of frogs are correct?
A: | Kidneys are situated a little posteriorly in the body cavity on both sides of the vertebral column. |
B: | Each kidney is composed of several structural and functional units called uriniferous tubules or nephrons. |
C: | Two ureters emerge from the kidneys in male frogs, where the ureters act as urinogenital ducts that open into the cloaca. |
D: | In females, the ureters and oviduct open separately in the cloaca. |
1. | 1 | 2. | 2 |
3. | 3 | 4. | 4 |
1. | ventral to the rectum which does not open in the cloaca. |
2. | ventral to the rectum which also opens in the cloaca. |
3. | dorsal to the rectum which does not open in the cloaca. |
4. | dorsal to the rectum which also opens in the cloaca. |
The cloaca in a frog is a small, median chamber that is used to pass:
1. | only faecal matter to the exterior. |
2. | only faecal matter and urine but not sperms to the exterior. |
3. | faecal matter, urine and sperms to the exterior. |
4. | faecal matter and sperms but not urine to the exterior. |