A fundamental difference between the endocrine and nervous systems is the __________.
A) distance the chemicals must travel to have an effect
B) types of chemicals used as transmitters
C) means by which messages travel from one cell to another (chemical vs. electrical)
D) presence vs. absence of target organs

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The Answer of A fundamental difference between the endocrine and nervous systems is the __________.
A) distance the chemicals must travel to have an effect
B) types of chemicals used as transmitters
C) means by which messages travel from one cell to another (chemical vs. electrical)
D) presence vs. absence of target organs

A Fundamental Difference Between the Endocrine and Nervous Systems Is