The intrapleural pressure at the end of deep inspiration is ______________?
(A) -4 mm Hg
(B) +4 mm Hg
(C) -18 mm Hg
(D) + mm Hg
The alveolar ventilation in an individual with tidal volume: 600 ml, dead space 150 ml and respiratory rate of 15/ minute is_____________?
(A) 2.5 lit/Min
(B) 4.0 lit /Min
(C) 6.75 Lit/Min
(D) 9 Lit/Min
Oxygen dissociation cure is shifted to the right in all except_____________?
(A) Fall in pH
(B) Rise in temperature
(C) Increase of 2, 3 3 DPG
(D) HbF
Muscle of expiration____________?
(A) Diaphragm
(B) Internal intercostals
(C) External intercostals
(D) Rcti Abdominis
In which of the following diseases would you expect to find an increase in thickness of the respiratory membrane ?
(A) Emphysema
(B) Asthma
(C) Pulmonary artery thrombosis
(D) Skeletal abnormalities of the chest
What is true about pneumothorax ?
(A) Total chest wall diameter is increased
(B) Interpleural pressure becomes more negative
(C) The concentration of surfactant is reduced in alveoli
(D) Increased lung compliance
An important non- respiratory function of lungs is_____________?
(A) Anion balance
(B) Sodium balance
(C) Potassium balance
(D) Ca+2 balance
Carbon monoxide poisoning causes_______________?
(A) Hypoxic hypoxia
(B) Oxygen dissociation curve shifts to left
(C) Cyanosis
(D) Diffusion capacity of lungs decreases
In cases of hypercapnia there is_______________?
(A) Increased pH of blood
(B) Decreased pH of blood
(C) Remains same
(D) Increased oxygen concentration in blood
Energy expenditure during normal breathing____________?
(A) 25% – 50% of total energy spent
(B) 50% -75% of total energy spent
(C) 15% – 20% of total energy spent
(D) 2% – 3% of total energy spent