Why is the respiratory system of a bird more efficient than the human respirator

Question

Why is the respiratory system of a bird more efficient than the human respiratory system? A) The bird respiratory system does not mix exhaled air with inhaled air. B) A bird lung contains multiple alveoli, which increases the amount of surface area available for gas exchange. C) The human respiratory system ends in small parabronchi, which reduce the amount of surface area available for gas exchange. D) Only B and C are correct. E) A, B, and C are correct. Which of the following animals have air sacs attached to their lungs? A) bird B) amphibians C) reptiles D) mammals E) all of the above How is most of the carbon dioxide transported by the blood in humans? A) bicarbonate ions in the plasma B) CO_2 attached to hemoglobin C) carbonic acid in the erythrocytes D) CO_2 dissolved in the plasma E) bicarbonate attached to hemoglobin Which of the following respiratory systems is not closely associated with a blood supply? A) the lungs of a vertebrate B) the gills of a fish C) the tracheal system of an insect D) the skin of an earthworm E) the parapodia of a polychaete worm In amphibians, air is forced into the lungs, not drawn into the lungs this is called: A) negative pressure breathing B) forced air breathing C) positive pressure breathing D) terrestrial breathing E) none of the above _____are tiny pores in the epidermis that facilitate the diffusion of carbon

Explanation / Answer

13. B

14. A

15. E

16. C (respiration and circulation are separate systems in earthworms)

17. C

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