In frogs:
1. Digestion of food takes place by the action of HCl and gastric juices secreted from the walls of stomach
2. Partially digested food called chyme is passed from stomach to the first part of intestine, the ileum
3. Digested food is absorbed by the numerous finger-like folds in the inner wall of intestine called villi and microvilli
4. Both (1) and (3) are correct
Subtopic: Â Frogs: Anatomy (Digestive System) |
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Which of the following is correct for the digestion in the alimentary canal of frog?
| 1. | Bile neutralises the acidity of chyme and emulsifies fat |
| 2. | Pancreatic juice contains various enzymes for the digestion of fats and carbohydrates |
| 3. | The absorbed food is absorbed by the fine and numerous finger-like projections present in the ileum |
| 4. | More than one option is correct |
Subtopic: Â Frogs: Anatomy (Digestive System) |
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In frogs:
1. Respiration by lungs is called pulmonary respiration
2. The lungs are a pair of elongated, pink coloured sacs present below the thorax
3. During aestivation and hibernation gaseous exchange takes place through skin
4. Both (1) and (3) are correct
1. Respiration by lungs is called pulmonary respiration
2. The lungs are a pair of elongated, pink coloured sacs present below the thorax
3. During aestivation and hibernation gaseous exchange takes place through skin
4. Both (1) and (3) are correct
Subtopic: Â Frogs: Anatomy (Respiratory System) |
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During buccal respiration in frogs:
1. The bucco-pharyngeal cavity is filled with air
2. Gaseous exchange occurs through the lining of buccal cavity
3. Both (1) and (2)
4. Pulmonary respiration stops
1. The bucco-pharyngeal cavity is filled with air
2. Gaseous exchange occurs through the lining of buccal cavity
3. Both (1) and (2)
4. Pulmonary respiration stops
Subtopic: Â Frogs: Anatomy (Respiratory System) |
 87%
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Choose the correct statement for the blood circulation in frog's heart:
| 1. | The left artrium receives oxygenated blood from pulmonary veins |
| 2. | The right atrium receives deoxygenated blood through sinus venosus |
| 3. | Sinus venosus receives blood from vena cava |
| 4. | More than one option is correct |
Subtopic: Â Frogs: Anatomy (Circulatory System) |
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Renal portal vein in frogs:
1. Carry oxygenated blood
2. Carry blood from lower part of the body to kidney
3. Both (1) and (2) are correct
4. May bypass kidney and directly enter heart
1. Carry oxygenated blood
2. Carry blood from lower part of the body to kidney
3. Both (1) and (2) are correct
4. May bypass kidney and directly enter heart
Subtopic: Â Frogs: Anatomy (Circulatory System) |
 60%
From NCERT
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Read the following statements regarding venous system of frogs:
How many of the above statements are correct?
1. One
2. Four
3. Five
4. Three
| (i) | Hepatic portal vein carries blood of alimentary canal and its glands to the liver. |
| (ii) | Pulmonary veins carry deoxygenated blood from lungs to left auricle. |
| (iii) | Vena cava carry deoxygenated blood from body parts to the heart. |
| (iv) | Renal portal veins carry blood from the hind limbs and gonads to the kidneys. |
| (v) | Special venous connections between the liver and intestine as well as the kidney and lower parts are present. |
1. One
2. Four
3. Five
4. Three
Subtopic: Â Frogs: Anatomy (Circulatory System) |
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The frog's blood:
1. Is composed of corpuscles but lack plasma
2. Contains RBCs, WBCs and platelets or thrombocytes and plasma
3. Contains RBCs which are oval, biconvex and nucleated
4. Is related to more than one option mentioned above
1. Is composed of corpuscles but lack plasma
2. Contains RBCs, WBCs and platelets or thrombocytes and plasma
3. Contains RBCs which are oval, biconvex and nucleated
4. Is related to more than one option mentioned above
Subtopic: Â Frogs: Anatomy (Circulatory System) |
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From NCERT
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Which of the following is incorrect for lymphatic system of frogs?
1. Lymph is without RBCs and contain few proteins only
2. Lymph is colourless
3. Lymph is continuously produced from filtering of blood through capillaries into intercellular spaces
4. Lymph hearts are absent
1. Lymph is without RBCs and contain few proteins only
2. Lymph is colourless
3. Lymph is continuously produced from filtering of blood through capillaries into intercellular spaces
4. Lymph hearts are absent
Subtopic: Â Frogs: Anatomy (Circulatory System) |
 54%
From NCERT
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Which of the following is true for the excretory system of frogs?
1. Two ureters emerge from the kidneys of male frogs which act as urinogenital duct that opens into cloaca
2. In female frogs ureters and oviduct forms the urinogenital duct that opens into cloaca
3. Both (1) and (2)
4. Urinary bladder is present dorsal to the rectum which open into the cloaca
1. Two ureters emerge from the kidneys of male frogs which act as urinogenital duct that opens into cloaca
2. In female frogs ureters and oviduct forms the urinogenital duct that opens into cloaca
3. Both (1) and (2)
4. Urinary bladder is present dorsal to the rectum which open into the cloaca
Subtopic: Â Frogs: Anatomy (Excretory System) |
 66%
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