Which embryonic structure gives rise to the trachea?
A. The conotruncus
B. The first pharyngeal arch
C. The pulmonary groove
D. The lung buds
E. The bulbus cordis
C. The pulmonary groove
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The respiratory membrane:
a. lines most of the air distribution tubes b. includes the wall of the alveoli c. includes the wall of the capillaries surrounding the alveoli d. both B and C above
Karen has AB negative blood. Which blood types can receive Karen's blood?
A. O negative B. B negative C. AB positive D. Both b and c
Functions of epithelia include all of the following except
A) providing physical protection. B) controlling permeability. C) absorption. D) producing specialized secretions. E) supporting muscle cells.
The swallowing center is located in the ________.
A. mouth B. enteric nervous system C. medulla oblongata D. oropharynx E. esophagus