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. |
1. | 8 pairs | 2. | 10 pairs |
3. | 11 pairs | 4. | 12 pairs |
1. | a pair of olfactory lobes |
2. | paired cerebral hemispheres |
3. | unpaired diencephalon |
4. | a pair of optic lobes |
Unlike human brain, which of the following structure is not a feature of a frog’s brain?
1. | Cerebellum | 2. | Pons varolii |
3. | Medulla oblongata | 4. | Olfactory lobes |
I: | central nervous system | brain and spinal cord |
II: | peripheral nervous system | cranial and spinal nerves |
III: | autonomic nervous system | sympathetic and parasympathetic |
1. | Only I and II | 2. | Only I and III |
3. | Only II and III | 4. | I, II and III |