Question

Consider the following statements each with two blanks.
(i) Diaphragm contracts to help in ___(1)__ while the contraction of abdominal muscles helps in (2).
(ii). Vital capacity of trained athletes is ___(3)___ than that of non-athletes while the vital capacity of non-smokers is ___(4)___ than that of smokers.
(iii) Alveolar P$O_2$ is ___(5)___ than the venous P$O_2$ while arterial P$O_2$ is ___(6)___ than the alveolar P$O_2$.
Which of the following options gives the correct fill ups for the respective blanks numbers from (1) to (6) in the above statements?

• A. (1)-expiration, (2)-inspiration (5)-higher, (6)-lower
• B. (3)-higher, (4)-lower, (5)-lower, (6)-higher
• C. (1)-inspiration, (2)-forced expiration, (3)-higher, (4)-higher
• D. (1)-expiration, (2)-forced expiration, (5)-higher, (6)-lower

Answer 1

Answer: (C)

(1)-inspiration, (2)-forced expiration, (3)-higher, (4)-higher

(i) Diaphragm contracts to help in (1) inspiration while the contraction of abdominal muscles helps in (2) forced expiration.

(ii) Vital capacity of trained athletes is (3) higher than that of non-athletes while the vital capacity of non-smokers is (4) higher than that of smokers.

(iii) Alveolar PO2 is (5) higher than the venous PO2 while arterial PO2 is (6) lower than the alveolar PO2.

So, the correct answer is '(1)-inspiration, (2)-forced expiration, (3)-higher, (4)-higher'.