Why would a premature infant require supplemental oxygen?
What will be an ideal response?
Answer: Premature lungs may not have adequate surfactant, a molecule that reduces surface tension in the lungs and assists proper lung expansion after birth. If the lungs do not expand properly, the newborn will develop hypoxia and require supplemental oxygen or other respiratory support.
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Choose the item that would provoke a cell to produce interferons.
A. Fungi B. Viruses C. Bacteria D. Chemical irritants
Which stage of cellular respiration is catalyzed by pyruvate dehydrogenase?
A. Electron transport system B. Intermediate stage C. Citric acid cycle D. Glycolysis E. Fermentation to lactate
The thin sheet of lubricant that is secreted between serous membrane layers is referred to as ________.
Fill in the blank(s) with the appropriate word(s).
The ventral rami of spinal nerves ________ form the major nerve plexuses
A) C1 through T1 and L1 through S4 B) L1 through S4 C) T2 through T12 D) C1 through T1