______ are chemical messengers that are sent through the bloodstream, triggering growth and development of cells elsewhere in the body.
Fill in the blank(s) with the appropriate word(s).
Hormones
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Which of the following quantities are necessarily constant: 
(a) An incompressible fluid (? = constant) flows through a pipe of constant cross-sectional area. If the flow is steady, show that velocity u and volumetric flow rate q are constant. (b) A chemically reactive gas stream flows steadily through a pipe of constant cross-sectional area. Temperature and pressure vary with pipe length.
The coefficient of ____ is used to calculate the amount of expansion that can be expected as temperatures change.
A. insulation B. thermal expansion C. heat transmission D. fire resistance
Name three groups of rabbits based on their use
What will be an ideal response?
Which of the following would be considered a professional staff position?
a. Plant superintendent b. Special assistant to the president c. Chief legal counsel d. Assistant manager e. Assistant to the manager