What are the chemical messengers released by neurons that are used to either to excite or to inhibit other cells?
A) paracrines
B) neurotransmitters
C) hormones
D) None of the listed responses is correct.
B
Explanation:
A) Paracrines are local chemical messengers that are released from certain types of connective tissue.
C) Hormones are chemical messengers released from endocrine cells.
D) One of the listed responses is correct.
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Fill in the blank(s) with the appropriate word(s).
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A. pulmonary semilunar B. mitral C. bicuspid D. tricuspid
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Answer the following statement true (T) or false (F)