Select the correct route for the passage of sperms in male frogs. [2017]
Testes → Vasa efferentia → Kidney → Seminal vesicle → Urogenital duct → Cloaca
Testes → Vasa efferentia → Bidder's canal → Ureter → Cloaca
Testes → Vasa efferentia → Kidney → Bidder's canal → Urogenital duct → Cloaca
Testes → Bidder's canal → Kidney → Vasa efferentia → Urogenital duct → Cloaca
(3)
The correct route for the transport of sperms in male frogs is:
Testes → Vasa efferentia → Kidney → Bidder's canal → Urogenital duct → Cloaca.
Frog's heart, when taken out of the body, continues to beat for some time. [2017]
Select the best option from the following statements
(1) Frog is a poikilotherm.
(2) Frog does not have any coronary circulation.
(3) Heart is "myogenic" in nature.
(4) Heart is autoexcitable.
Only (4)
(1) and (2)
(3) and (4)
Only (3)
(3)
Frog's heart is myogenic, i.e., the heartbeat originates from the muscles of the heart. Hence, it is autorhythmic. Wave of contraction originates from sinus venosus and spreads to wall of sinus venosus and both auricles. This compels the heart to beat. Due to this reason, frog's heart will continue to beat as long as it gets a supply of ATP.
What is the name of the blood vessel that carries deoxygenated blood from the body to the heart in a frog? [2025]
Aorta
Pulmonary artery
Pulmonary vein
Vena cava
(4)
Frog’s heart is a muscular structure with three chambers. It receives deoxygenated blood from body parts through the major veins called vena cava. Vena cava carries deoxygenated blood. Aorta and pulmonary vein carries oxygenated blood. Whereas, pulmonary artery will carry deoxygenated blood towards the lungs.
Which of the following statement is correct about location of the male frog copulatory pad? [2025]
First and Second digit of fore limb
First digit of hind limb
Second digit of fore limb
First digit of the fore limb
(4)
In male frogs, copulatory pad is present on the first digit of the forelimbs which are absent in female frogs.
In frog, the Renal portal system is a special venous connection that acts to link : [2025]
Liver and intestine
Liver and kidney
Kidney and intestine
Kidney and lower part of body
(4)
In frogs, special venous connection between liver and intestine as well as the kidney and lower parts of the body are present in frogs. The former is called hepatic portal system and the latter is called renal portal system.
Frogs respire in water by skin and buccal cavity and on land by skin, buccal cavity and lungs.
Choose the correct answer from the following : [2025]
The statement is true for water but false for land
The statement is true for both the environment
The statement is false for water but true for land
The statement is false for both the environment
(3)
• In water, frogs respire through skin and not through buccal cavity i.e., undergo cutaneous respiration only.
• On land, the buccal cavity, skin and lungs act as respiratory organs i.e., undergo buccopharyngeal , cutaneous and pulmonary respiration.
