11. How much can the lungs be expanded to reach the total lung capacity?
A)4800
B)6000
C)1200
D)5800
12.Which of the following best describes the process of gas exchange in
the human body?
a) Oxygen is transported to the body’s cells by red blood cells and
carbon dioxide is transported back to the lungs to be exhaled.
b) Carbon dioxide is absorbed by the body’s cells from the
bloodstream, while oxygen is expelled from the cells into the
bloodstream.
c) Oxygen is absorbed directly into the bloodstream through the skin,
and carbon dioxide is exhaled through the digestive system.
d) Oxygen and carbon dioxide are both exchanged in the intestines,
where oxygen is taken up and carbon dioxide is expelled.
e) none of the above.
13.Which statement best explains how the lungs remain inflated within the
thoracic cavity?
a) The lungs are directly attached to the walls of the chest cage,
preventing collapse.
b) The continual suction of excess fluid into the lymphatics creates a
slight negative pressure between the pleural layers, keeping the lungs
adhered to the thoracic wall.
c) The lungs are surrounded by a thick layer of pleural fluid that firmly
glues them to the thoracic cavity.
d) The lungs are suspended from the mediastinum by the hilum and
are otherwise free-floating within the thoracic cavity without any
attachment.
e) none of the above.
14.Which neurotransmitter is most commonly associated with the
parasympathetic nervous system?
A. Dopamine
B. Norepinephrine
C. Serotonin
D. Acetylcholine
E. GABA