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
Identify the component of respiratory system which displays the features given below and choose the correct option
I. Double layered
II. Fluid contained in it reduces the friction on the lung surface
III. Its outer layer is in contact with thoracic wall
IV. Its inner layer is in contact with lungs
Visceral layer
Peritoneum cavity
Visceral organs
Pleura
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
Which of the following statement is true regarding the human respiratory system?
Tracheal rings are of hyaline cartilage
Dorsal side of the thoracic chamber is formed by sternum
Expiration occurs when there is negative pressure in the lungs
Inspiration occurs when there is positive pressure in the lungs
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
Correct sequence of the air passage in humans is
Nose → Larynx → Pharynx → Bronchioles → Alveoli
Nose → Pharynx → Larynx → Bronchioles → Bronchi
Nose → Pharynx → Larynx → Bronchioles → Trachea
External nostril → Nasal passage → Internal nostril → Pharynx → Larynx → Trachea → Bronchi Bronchiole → Alveoli
Identify the different parts of the respiratory system in accordance to their location given below
I. Posterior part of the pharynx
II. Present at the glottis
III. In front of oesophagus
Choose the correct option accordingly
I-Nasal cavity, II-Larynx, III-Bronchi
I-Nasopharynx, II-Epiglottis, III-Wind pipe
I-Glottis, II-Larynx, III-Trachea
I-Larynx, II-Epiglottis, III-Trachea
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
Which of the following statement is true regarding the human respiratory system?
Tracheal rings are of hyaline cartilage
Dorsal side of the thoracic chamber is formed by sternum
Expiration occurs when there is negative pressure in the lungs
Inspiration occurs when there is positive pressure in the lungs
Which of the following statements regarding the chloride shift in the respiratory system is INCORRECT?
Chloride ions move into the red blood cell as bicarbonate ions move out.
It occurs in systemic capillaries.
It is essential for maintaining electrical neutrality during CO2 transport.
It results in a decrease in the pH of the red blood cell
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
