Which of these causes inhalation/inspiration?
A. increase in the curvature (upward movement) of the diaphragm
B. movement of the ribs closer together due to contraction of the internal intercostal muscles
C. flattening (downward movement) of the diaphragm
D. contraction of the abdominal muscles
E. alveolar pressure increasing above atmospheric pressure
C
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The ________ border of the heart includes the bases of the major vessels.
Fill in the blank(s) with the appropriate word(s).
The integrating center for the negative feedback loop that regulates body temperature is the
A) brain. B) skin. C) temperature receptor. D) positive feedback center. E) thermostat.
Which of the following is true of the pulmonary pressures?
A. Because of pneumothorax, intrapleural pressure equilibrates with atmospheric pressure. Without the positive force of alveolar pressure pushing the lung outward, the lung collapses due to elastic recoil forces. B. Intrapleural pressure is always positive so that the pleural membranes remain in contact. C. An increase in transpulmonary pressure creates a larger collapsing pressure across the lungs, which is accompanied by the contraction of the lungs (alveoli). D. The difference between intra-alveolar pressure and atmospheric pressure is the pressure gradient that drives ventilation.
Olfactory receptors are located in the membrane that lines the ____ meatus
a. inferior b. medial c. superior d. lateral