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.

Anatomy & Physiology

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Fill in the blank(s) with the appropriate word(s).

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What structure, found surrounding PNS axons, is NOT found surrounding CNS axons?

A. Neurilemma B. Myelin sheath C. Plasma membrane D. Nodes of Ranvier

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As blood leaves the right atrium, it passes through the ________ valve to the right ventricle.

A. pulmonary semilunar B. mitral C. bicuspid D. tricuspid

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True or False? The composition of extracellular fluid has little affect on intracellular fluid amounts.

Answer the following statement true (T) or false (F)

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