During expiration, relaxation of the diaphragm and external intercostals
A. increases the volume of the thoracic cavity.
B. increases the pressure in the thoracic cavity.
C. expands the rib cage.
D. flattens the floor of the thoracic cavity.
E. stimulates the phrenic nerve.
B
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The largest amount of air that can be breathed in and out in one breath is called:
a. vital capacity b. residual volume c. tidal volume d. expiratory reserve volume
Pain impulses are first processed in the
A) dorsal root ganglion. B) motor cortex of the cerebrum. C) gray matter of the posterior horn. D) cerebral cortex.
The ____ is a tubular passageway that extends from the cricoid cartilage of the larynx to the fifth thoracic vertebra
a. pharynx b. esophagus c. bronchus d. trachea
What does the vagus nerve (CN X) innervate?
A) sweat glands B) adipocytes C) blood vessels D) cardiac muscle cells