What function do the C-shaped tracheal cartilages allow?
A) Allow room for the trachea to expand if you inhale a large volume of air.
B) Allow room for the esophagus to expand during swallowing.
C) Allow room for blood pulses to expand the common carotid artery without interfering with air flow.
D) Allow the trachea to collapse on itself when no inhalation or exhalation is occurring to reduce space in the mediastinum.
E) Allow gas diffusion to occur around the cartilage surfaces and the tissues of the mediastinum.
Answer: B
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The initial site of both mechanical and chemical digestion is the
A. oral cavity. B. small intestine. C. pharynx. D. stomach. E. esophagus.
Which of the following is a function of the glottis? A) moving air to and from the exchange surfaces B) production of sound C) protecting from dehydration by filtering water out of the air D) providing an extensive surface area for gas exchange E) All of the answers are correct.
A) moving air to and from the exchange surfaces B) production of sound C) protecting from dehydration by filtering water out of the air D) providing an extensive surface area for gas exchange E) All of the answers are correct.
Macrophage colony-stimulating factor stimulates the production of
A. granulocytes from their progenitors. B. erythrocytes from myeloid stem cells. C. megakaryocytes and platelets. D. monocytes from monoblasts. E. erythrocyte progenitor cells.