test-17 - 1. A) B) C) D) E) The endocrine system releases...

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1. The endocrine system A) releases neurotransmitters into ducts. B) secretes chemicals that reach their targets through the bloodstream. C) communicates via frequency-modulated signals. D) contains organs called exocrine glands. E) is isolated from the nervous system. 2. Hormones are intercellular chemical signals that A) are secreted into the external environment where they act. B) affect only non-hormone producing organs or tissues. C) help coordinate growth, development and reproduction. D) alter the sensitivity of neurons to neurotransmitters. E) operate primarily by positive feedback. 3. Given the following list of organic molecules, which includes hormones? 1. nucleic acid derivatives 2. polypeptides 3. steroids 4. proteins A) 1, 3, 4 B) 1, 2, 3 C) 2, 3, 4 D) 1, 2, 3, 4 E) 1, 2, 4 4. Hormonal secretion can be regulated by A) the action of a substance other than a hormone. B) the nervous system. C) other hormones. D) all of the above. E) none of the above. 5. Secretion of TSH (thyroid-stimulating hormone) is regulated by A) the action of a substance other than a hormone. B) the nervous system. C) the action of other hormones. D)
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This note was uploaded on 11/02/2011 for the course BIOL 2402 taught by Professor Staff during the Fall '08 term at HCCS.

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test-17 - 1. A) B) C) D) E) The endocrine system releases...

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