Which structure is located anterior to the esophagus and carries air to the bronchi?
a) Trachea
b) Larynx
c) Nasopharynx
d) Pharynx
e) None of these choices
a
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Which of the following would result from a reduced function of the Na+ channels in the SA node?
A. The heart rate would decrease. B. Depolarization would be delayed. C. Depolarization would be delayed, and the heart rate would decrease. D. The plateau phase would be shorter. E. Repolarization would not occur.
"Somatosensory" does not refer to sensory signals from ________.
A. joints B. the skin C. the viscera D. bones and muscles E. proprioceptors
Which breathing action is a passive process?
A) Normal/quiet inspiration B) Forced expiration C) Normal/quiet expiration D) Forced inspiration
The endoderm does not give rise to which of the following structures?
A. The lining of the respiratory tract B. The thymus C. The thyroid gland D. The blood E. The lining of the digestive tract