The most important energy-rich phosphate compound in cells is
a. NADH.
b. NAD+.
c. ATP.
d. acetyl-CoA.
Answer: C
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Match the following items with the correct phrases.
_______1. A decreased number of white blood cells in the peripheral bloodstream. _______2. Increase in the diameter of blood vessels; an initial event in inflammation. _______3. An increased number of white blood cells in the peripheral bloodstream. _______4. Considered to be the first phase of phagocytosis; the means by which phagocytic cells are attracted to sites where they are needed. a. chemotaxis b. leukocidin c. leukocytosis d. leukopenia e. vasodilation
Plant cells called ____ form the protective coat around seeds
a. sclerenchyma b. tracheids c. collenchyma d. parenchyma e. vessel members
What is the primary determinant of airway resistance?
A) traction competency B) presence of mucous C) rate of air exchange D) compliance E) airway radius
When naming a life form, which of the following two taxonomic categories is used?
A) class and order B) family and genus C) genus and species D) kingdom and phylum E) domain and phylum