Which structure will sometimes disappear in adults?
A) Spleen B) Sinus C) Thymus D) Pancreas
C) Thymus
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Immature, active bone cells that produce new bone matrix are termed
A) osteocytes. B) stem cells. C) osteoblasts. D) osteoclasts. E) chondrocytes.
Older red blood cells may be destroyed in the spleen
Indicate whether the statement is true or false
As the result of an asthmatic attack,
A. pulmonary blood flow is reduced while ventilation remains normal. B. ventilation exceeds the ability of blood to pick up oxygen. C. the surface area available for gas exchange increases. D. bronchioles dilate. E. ventilation is inadequate to oxygenate blood.
The flow-restricted, oxygen-powered ventilation device:
A) has a demand valve that is triggered by the negative pressure generated during inhalation. B) is the preferred initial device for ventilating an apneic or inadequately breathing patient. C) delivers 100% oxygen to apneic patients at a fixed flow rate of 50 to 60 L/min. D) should be used in patients with thoracic trauma because it is less likely to cause barotrauma.