Question

One difference in the breathing mechanism of frog and rabbit is that
(a)Expansion of frog’s lungs is not much
(b)Abdominal movement is more in frog
(c)Diaphragm and rib muscles play important role in rabbit
(d)Air reaching the frog’s lungs are too cool

Answer 1

Hint: The frog (Rana tigrina) belongs to Amphibia that are animals that cannot regulate their internal body temperature. Whereas the rabbit (Oryctolagus cuniculus) belongs to Mammalia and can regulate its internal body temperature and thus homeostasis is maintained in it.

Complete answer:
As frogs are cold-blooded or poikilotherms, their body temperature is the same as the temperature of the environment. Thus the air that they inhale is also just as cool as the temperature outside. There is no heating mechanism in frogs to warm the air.
Since rabbits are warm-blooded animals, their body is always at a certain temperature. Thus, the air inhaled during inspiration is also made warm by the upper respiratory tract. This is done by the presence of three nasal conchae or turbinates which warm the air.

Additional Information: Let us look in more detail about how respiration takes place in the frog and rabbit.
Frog: Respiration in frogs occurs in two different methods. In water, respiration takes place through the skin by diffusion and is known as cutaneous respiration. On land, respiration takes place by the buccal cavity, skin, and lungs.
Rabbit: Respiration in rabbits occurs just like it does in every other mammal. Air passes through the respiratory tract to the alveoli where diffusion of gases takes place.
So, the correct answer is ‘Air reaching the frog’s lungs is too cool’.

Note: -Amphibia is a class of the phylum Chordata and subphylum Vertebrata. The characteristic feature of Amphibia is that they can live on land as well as water hence the name amphibians.
-The other species of frog known are Bufo (Toad), Rana (Frog), Hyla (Tree frog), Salamandra (Salamander).
-Mammalia is a class of Vertebrata which possess a pair of mammary glands (milk-producing glands) for the nourishment of their young ones.