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.
Answer: A) has a demand valve that is triggered by the negative pressure generated during inhalation.
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The vasa recta is a network of blood vessels located mostly within which of the following?
a) cortex b) medulla c) capsule d) sinus
It is important that flow of blood in the ________ is slow, allowing time for nutrients and wastes to be exchanged between the blood and tissues.
Fill in the blank(s) with the appropriate word(s).
The ______ is a long, straight tube that carries air from the back of the throat to the lungs.
Fill in the blank(s) with the appropriate word(s).
How is the lacuna different from the canaliculus?
A) The canaliculus delivers the osteocyte to the lacuna. B) The lacuna houses the osteocyte, whereas the canaliculus holds houses the cytoplasmic extension of the osteocyte. C) The lacuna delivers blood to the canaliculus. D) The canaliculus delivers blood to the lacuna.