How would tracheal function differ from that of typical humans if the cartilaginous rings were complete rather than C shaped?
A) There would be little, if any, functional difference.
B) Resistance to airflow could not be changed by using musculature only.
C) The anterior aspect of the trachea would be unable to distort during passage of a large
bolus through the esophagus.
D) There would not be a trachealis muscle to contract to constantly adjust the diameter of the
tracheal lumen.
E) All of the answers are correct.
D) There would not be a trachealis muscle to contract to constantly adjust the diameter of the
tracheal lumen.
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Answer the following statement true (T) or false (F)
The resting membrane potential of a typical nerve cell is ____ mV
a. -60 b. +70 c. -90 d. -50 e. -70
The long refractory period observed in cardiac muscle
A. prevents tetanic contractions of the cardiac muscle. B. prevents an increase in heart rate. C. ensures that the heart has adequate time to contract. D. prevents the heart rate from slowing down. E. prolongs depolarization of the cardiac muscle.
Which of the following does not produce chewing movements of the mandible?
A. Masseter B. Medial pterygoid C. Temporalis D. Lateral pterygoid E. Thyrohyoid