Which of the following changes will increase the body’s rate of CO2 excretion into the alveoli?
a) holding the breath
b) the breakdown of alveolar tissue as a result of disease
c) a decrease in the partial pressure of CO2 in the alveolar air
d) a decrease in the pulmonary circulation
Breathing is an example of ……
a) counter current exchange
b) cellular respiration
c) ventilation
d) diffusion
Which event is not associated with the activity of expiration?
a) contraction of the diaphragm
b) more dome like shape of diaphragm
c) backward and downward movement of rib cage
d) relaxation of external intercostals muscles
Respiratory pigments…….
a) combine reversibly with only oxygen
b) all have four haem groups
c) attach to the alveolar wall
d) none of them
Which sequence most accurately describes the sequence of airflow in the human respiratory system?
1. Pharynx 2. Bronchus 3. Trachea
4. Larynx 5.alveolus 6. Bronchiole
a) 4,1,3,2,5,6
b) 1,4,3,2,5,6
c) 4,1,3,2,6,5
d) 1,4,3,2,6,5
