The single ventricle in the heart of a frog:
1. | opens into a sac-like conus arteriosus on the dorsal side of the heart. |
2. | opens into a sac-like conus arteriosus on the ventral side of the heart. |
3. | opens into a dilated chamber sinus venosus on the ventral side of the heart. |
4. | opens into a dilated chamber sinus venosus on the dorsal side of the heart. |
I: | Hepatic portal system |
II: | Renal portal system |
Sinus venosus in the heart of a frog:
I: | joins the left atrium |
II: | pumps blood into the major arteries |
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Statement I: | The vascular system of frog is well-developed and closed type. |
Statement II: | Frogs do not have a lymphatic system. |
1. | Statement I is correct, Statement II is correct |
2. | Statement I is incorrect, Statement II is correct |
3. | Statement I is correct, Statement II is incorrect |
4. | Statement I is incorrect, Statement II is incorrect |
Heart of a frog:
I: | has three chambers |
II: | is a muscular pump |
III: | is covered by pericardium |
1. Only I and II are correct
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
I: | are nucleated |
II: | contain haemoglobin |
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. |