The influence of blood vessel diameter on peripheral resistance is ________
A) significant because resistance is inversely proportional to the fourth power of the vessel radius
B) significant because resistance is directly proportional to the blood vessel diameter
C) insignificant because vessel diameter does not vary
D) the only factor that influences resistance
A
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Indicate whether the statement is true or false
The mechanical and chemical receptors that control digestive activity are located ________.
Fill in the blank(s) with the appropriate word(s).