The paranasal sinuses function in
A) contributing to the floor of the cranium.
B) deflecting inhaled air toward the olfactory receptors located near the upper portions of the nasal cavity.
C) supporting and stabilizing the position of the larynx.
D) forming the floor and medial portion of the rim of the orbit.
E) lightening the skull and providing an extensive area of mucous epithelium.
E) lightening the skull and providing an extensive area of mucous epithelium.
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The hilum of the lung
A. serves to anchor all pulmonary structures to the mediastinum. B. is an indented area through which the bronchi, pulmonary vessels, lymphatic vessels, and nerves pass. C. is the point of exit of exhaled air. D. is an elevated area through which the trachea, pulmonary vessels, and nerves pass. E. is the point of entrance for inhaled air.
Both pepsin and trypsin are proteins that digest proteins
Indicate whether this statement is true or false.
A patient is diagnosed with leukocytosis if they have more than ________ WBCs/?L.
A. 5,000 B. 50,000 C. 10,000 D. 100,000 E. 1,000
The effects of cell-mediated immunity are the result of activities of
A. B cells. B. cytotoxic T cells. C. macrophages. D. dendritic cells. E. helper T cells.