A unique feature of the avian respiratory system is the presence of air sacs. Which of the following is NOT a function of these air sacs?
Reduce the weight of the bird
Act as bellows to move air through the lungs
Direct gas exchange with the blood
Help maintain a unidirectional airflow through the lungs
Related Questions
The conducting portion of the respiratory tract performs all of the following functions EXCEPT:
Gas exchange
Trapping of dust particles
Adjusting air temperature
Moistening inhaled air
Site of aerobic respiration in higher organisms is/are
Golgi apparatus
Mitochondria
Both (a) and (b)
Lungs
Which activity is NOT associated with the conducting zone of the human respiratory system?
Diffusion of oxygen into the blood
Removal of particulate matter from inhaled air
Humidifying inhaled air
Warming inhaled air to body temperature
Site of aerobic respiration in higher organisms is/are
Golgi apparatus
Mitochondria
Both (a) and (b)
Lungs
The volume of air inhaled or exhaled during normal breathing is called:
Residual volume
Vital capacity
Tidal volume
Total lung capacity
All of the following describe functions of the conducting zone EXCEPT:
Facilitating diffusion of and across the alveolar membrane
Cleaning the air of dust and other debris
Warming incoming air to body temperature
Moisturizing inhaled air to prevent dehydration of respiratory surfaces
Oxygen is utilised by an organism to
Directly breakdown the nutrient molecules
Indirectly breakdown the nutrient molecules
Obtain nourishment from the food
Burn the organic compounds indirectly
