. The largest salivary gland is the ________ gland, and its duct opens near the second upper molar
Fill in the blank with correct word.
parotid
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The pericardial cavity is between the
A. heart muscle and serous pericardium. B. fibrous and serous layers of the pericardium. C. visceral and parietal layers of the serous pericardium. D. parietal and myocardial layers of the fibrous pericardium.
The esophagus
A. secretes digestive enzymes from its mucosa. B. is located anterior to the trachea. C. opens to the stomach at the pyloric sphincter. D. contains both smooth and skeletal muscle fibers. E. is lined with pseudostratified ciliated columnar epithelium.
The volume of alveolar air and capillary blood in the right proportion to each alveolus produces __________.
a. optimum breathing b. pulmonary surfactant c. lung efficiency d. pulmonary circulation
About 23% of the carbon dioxide in the blood is attached to the ________ portion of hemoglobin.
A. carboxyl B. globin C. anhydrase D. heme