ESSENTIAL CELL BIOLOGY, FOURTH EDITION CHAPTER 16: CELL SIGNALING Southern Methodist University - BIOL 3350ECB4_QuestionBank_Ch16

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ESSENTIAL CELL BIOLOGY, FOURTH EDITION CHAPTER 16: CELL SIGNALING © 2014 GARLAND SCIENCE PUBLISHING General Principles of Cell Signaling 16-2 For each of the following sentences, fill in the blan... ks with the best word or phrase selected from the list below. Not all words or phrases will be used; each word or phrase should be used only once. Cells can signal to each other in various ways. A signal that must be relayed to the entire body is most efficiently sent by endocrine cells, which produce hormones that are carried throughout the body through the bloodstream. On the other hand, contact-dependent methods of cell signaling do not require the release of a secreted molecule and are used for very localized signaling events. During paracrine signaling, the signal remains in the neighborhood of the secreting cell and thus acts as a local mediator on nearby cells. Finally, neuronal signaling involves the conversion of electrical impulses into a chemical signal. Cells receive signals through a receptor, which can be an integral membrane protein or can reside inside the cell. amplification G protein phosphorylation contact-dependent K+ channel receptor endocrine neuronal target epithelial paracrine 16-5 When a signal needs to be sent to most cells throughout a multicellular organism, the signal most suited for this is a ___________. (a) neurotransmitter. (b) hormone. (c) dissolved gas. (d) scaffold. 16-7 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. [Show More]

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