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 |
1. | olfactory lobes | 2. | cerebral hemispheres |
3. | diencephalon | 4. | cerebellum |
1. | Foramen ovale | 2. | Foramen spinosum |
3. | Foramen magnum | 4. | Obturator foramen |
I: | Sensory papillae for touch |
II: | Taste buds |
III: | Nasal epithelium |
IV: | Eyes |
V: | Tympanum with internal ears |
1. | Only I, II and III | 2. | Only IV and V |
3. | Only II, IV and V | 4. | Only IV |
I: | are situated in the orbit in skull. |
II: | are compound eyes possessing a large number of units. |