Air movement to the mammalian respiratory surfaces can be reduced when smooth muscle in the walls of the ____ contract(s) .
A) epiglottis
B) bronchioles
C) large bronchi
D) trachea
E) aorta
Correct Answer:
Verified
Q22: The _ is/are responsible for closing off
Q23: A _ uses air sacs to ventilate
Q24: The respiratory surfaces of mammalian lungs are
Q25: The primary muscle(s) involved in human breathing
Q26: The _ stimulate(s) forceful inhalation and exhalation.
A)
Q28: The concentration of _ has the greatest
Q29: Among air breathing animals, birds have the
Q30: During exhalation, the chest cavity _ in
Q31: The _ keeps the lungs from completely
Q32: The _ drive(s) inhalation by stimulating contraction
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