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  Your breathing rate is 12 breaths/minute; your tidal volume is 500 mL; your vital capacity is 4700 mL; and your dead air space is 150 mL.  If you went snorkeling you would need to increase your breathing rate to maintain the alveolar ventilation rate.  This is because of the increase of 

Which of these conditions produces increased compliance of the lungs?  Alveoli are confluent and very easy to fill. 

If compliance increases, lung expansion is

B cells

Antigen-presenting cells usually display processed antigens to T cells in the

Newborn infants gain most of their immunity from

Arrange the following structures in the correct order as air passes through them traveling from the bronchi:1. alveolar duct2. alveolus3. respiratory bronchiole4. terminal bronchiole

Each alveolus is surrounded by a basket of blood capillaries supplied by

Which of the following enzymes in an RBC breaks H2CO3 (carbonic acid) down to water and carbon dioxide?

The amount of air in excess of tidal volume that can be inhaled with maximum effort is called