Air directly enters the tracheae via the

A. external nares

B. pharynx

C. larynx

D. bronchi

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  1. The oxygen pressure in the alveolar air is
  2. The maximum volume of inspirable air is called
  3. The medullary inspiratory centre is always under direct control of
  4. The condition in which the body suffers from acute oxygen shortage is called
  5. Oxygen will diffuse through a membrane only if it is
  6. In response to high altitude hypoxia supply of oxygen to the tissue is maintained by
  7. The rate and depth of breathing is primarily controlled by medulla by
  8. Diaphragm is characteristic of
  9. Anoxia means
  10. In a man at rest the body's cells consume approximately
  11. The vibrations of which of these membranes produces vocal sounds?
  12. Colour of oxyhaemoglobin is
  13. Oxygen is transported to every cell of the body through
  14. Ciliated epithelium in the trachea of mammals helps in
  15. The substances undergoing slow oxidation in the body during respiration are known as
  16. The functional unit of the lung is
  17. Which of the following can respire in total absence of air (anoxyliosis)?
  18. The respiratory portion of the respiratory tract consists of
  19. Internal respiration refers to
  20. The membrane covering the lungs is
  21. Emphysema is a respiratory disease in which
  22. In rabbits, respiration takes place in
  23. The capacity of lungs for air in a healthy man is about
  24. During inspiration in mammals, the diaphragm shall
  25. The metal associated with haemoglobin is
  26. Among the following, the maximum amount of usable energy is released per-molecule of glucose by
  27. Air directly enters the tracheae via the
  28. The "mountain sickness" in persons climbing to high attitudes without the aid of oxygen cylinders is…
  29. To take air into the lungs, the diaphragmmust be
  30. In frog, the alveoli are surrounded by