Q. Which of these is true of the endocrine system?
A. secretes hormones that are transported to target cells by blood
B. causes changes in metabolic activities
C. effects are prolonged
D. All of above are true.
Answer: All of above are true.
A. secretes hormones that are transported to target cells by blood
B. causes changes in metabolic activities
C. effects are prolonged
D. All of above are true.
Answer: All of above are true.
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