What role do white blood cells play in the various functions of the blood?
A. Transportation
B. Communication
C. Protection
D. Regulation
Answer: C
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Which of the following is not a true statement?
A) The DRG primarily controls inspiration. B) The VRG primarily controls expiration. C) The DRG functions in forced breathing only. D) The VRG functions in forced breathing only. E) The DRG controls external intercostals and the diaphragm.
Where is the hilum of the lung found?
A. On its cupola B. On its cardiac notch C. On its mediastinal surface D. On its costal surface E. On its base
Which type of cell phagocytizes foreign or injured cells and plays a major role in providing protection against infections?
A. Stem cell B. Mast cell C. Adipocyte D. Osteoclast E. Macrophage
The "control center" of the cell is the
A. endoplasmic reticulum. B. mitochondrion. C. nucleus. D. plasma membrane. E. ribosome.