1) Venous blood returning from systemic circulation first enters the ___,
proceeds to the ____, loses ___and gains ____ in the lungs, and then
returns to the heart via the ____.
a) right atrium, right ventricle, pulmonary artery, CO2, O2, pulmonary
veins.
b) Left atrium, left ventricle, pulmonary artery, CO2, O2, aorta
c)Right atrium, right ventricle, pulmonary artery, O2, CO2, pulmonary
veins
d) Left atrium, right ventricle, pulmonary veins, O2, CO2, aorta
A. Right atrium, right ventricle, pulmonary artery, CO2, O2,
pulmonary veins
2) The upper respiratory tract differs from the lower respiratory tract in what
way?
A) air is taken in through the lower respiratory tract, and CO2/O2 are
exchanged in the upper respiratory tract
b) air is taken in through the upper respiratory tract, and CO2/O2 are
exchanged in the lower respiratory tract
c) CO2 is removed from circulation in the upper respiratory tract
d) O2 is removed from circulation in the lower respiratory tract
b). Air is taken in through the upper respiratory tract, and
CO2/O2 are exchanged in the lower respiratory tract
3) Smooth muscle surrounds which structure of the lower respiratory tract?
a) Alveoli
b) Alveolar capillaries
c) Terminal bronchioles
d) Trachea
c). terminal bronchioles
4) In the alveolus, ____squamous epithelial cells are responsible for ___,
while ___cells are responsible for ____.
a) Type 1; surfactant secretion; Type 2, gas exchange
b) type 1; debris removal; type 2; surfactant secretion
c) type 3; debris removal; type 1; gas exchange
d) type 1; gas exchange; type 2: surfactant secretion
d) type 1; gas exchange; type 2: surfactant secretion
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