Which of the following statements is true?
(a) Because endocrine signals are broadcast throughout the body, all cells will respond to the hormonal signal.
(b) The regulation of inflammatory responses at the site of an infection is an example of paracrine signaling.
(c) Paracrine signaling involves the secretion of signals into the bloodstream for distribution throughout the organism.
(d) The axons of neurons typically signal target cells using membrane-bound signaling molecules that act on receptors in the target cells.
Answer:
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