A rare genetic mutation affects the function of pulmonary surfactant. Which of the following would be the MOST direct consequence of this mutation?
Decreased airway resistance and increased airflow
Increased alveolar surface tension and difficulty inflating lungs
Enhanced gas exchange and increased oxygen diffusion
Reduced pulmonary blood pressure and improved circulation
Related Questions
Which one respires through gills?
Fish
Bird
Snake
Dog
Mechanism of breathing vary among different group of animals depending mainly on the
A) Habits B) Habitats
C) Levels of organization D) Demand of situation
A) Habits
B) Habitats
C) Levels of organization
D) Demand of situation
Among vertebrates, …A… use gills whereas reptiles, birds and mammals respire through the …B… . Amphibians like frogs can respire through …C… also. Mammals have a well adapted respiratory system
Select appropriate choice for the blanks A, B and C to complete the given NCERT statement
A-fishes, B-lungs, C-gills
A-fishes, B-lungs, C-dry skin
A-fishes, B-lungs, C-moist skin
A-mammals, B-gills, C-moist skin
A patient exhibits chronic hypoventilation, leading to respiratory acidosis. Which compensatory mechanism is MOST likely to be activated?
Decreased renal bicarbonate reabsorption
Increased renal bicarbonate reabsorption
Decreased renal hydrogen ion secretion
Increased respiratory rate
A fully grown tadpole larva of respires through
Skin
Gills
Lungs
Trachea
Which structure separates the thoracic cavity from the abdominal cavity?
Rib cage
Diaphragm
Lungs
Heart
When the nutrients are oxidised without using molecular called …A… in yeast glucose formed …B… and . Endoparasite also respire …C… . It gives low energy. Choose the correct option for A, B and C
Anaerobic respiration, Ethanol, Anaerobically
Aerobic respiration, Lactic acid, Aerobically
Anaerobic respiration, Lactic acid, Anaerobically
Aerobic respiration, Ethanol, Aerobically
Which is the wrong matched
sponges – entire body surface
insects – body surface
aquatic arthropods – gills
earth worms - moist cuticle
The role of surfactant in the alveoli is to:
Increase surface tension and facilitate gas exchange
Reduce surface tension and prevent alveolar collapse
Increase lung compliance by thickening alveolar walls
Decrease lung compliance by making alveolar walls more rigid
Which of the following is the primary site of gas exchange in the lungs?
Trachea
Bronchi
Alveoli
Pleural cavity
