Chapter 45 - Biology, 7e (Campbell) Chapter 45: Hormones...

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Biology, 7e (Campbell) Chapter 45: Hormones and the Endocrine System Chapter Questions 1) Which of the following statements about hormones is incorrect ? A) They are produced by endocrine glands. B) They are modified amino acids, peptides, or steroid molecules. C) They are carried by the circulatory system. D) They are used to communicate between different organisms. E) They elicit specific biological responses from target cells. Answer: D Topic: Concepts 45.1-45.4 Skill: Comprehension 2) The secretion of hormone A causes a change in the amount of protein X in an organism. If this mechanism works by positive feedback, which of the following statements represents that fact? A) An increase in A produces an increase in X. B) An increase in X produces a decrease in A. C) A decrease in A produces an increase in X. D) A and B are correct. E) B and C are correct. Answer: A Topic: Concept 45.1 Skill: Comprehension 3) Which of the following is (are) true? A) Hormones regulate cellular functions, and negative feedback regulates hormone levels. B) The circulating level of a hormone is held constant through a series of positive feedback loops. C) Both lipid-soluble hormones and water-soluble hormones bind to intracellular protein receptors. D) Only A and D are true. E) A, B, and C are true. Answer: A Topic: Concepts 45.1, 45.2 Skill: Knowledge 4) What do nitric oxide and epinephrine have in common? A) They both function as neurotransmitters. B) They both function as hormones. C) They are both involved in the "fight-or-flight" response. D) Only A and B are correct. E) A, B, and C are correct. Answer: D Topic: Concepts 45.1, 45.2 Skill: Comprehension 1
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5) Substance X is secreted by one cell, travels a short distance through interstitial fluid, and produces an effect in a cell immediately adjacent to the original secreting cell. All of the following terms could describe this substance except A) nitric oxide. B) neurotransmitter. C) prostaglandin. D) pheromone. E) growth factor. Answer: D Topic: Concepts 45.1, 45.2 Skill: Comprehension 6) Based on their effects, which pair below could be considered antagonistic? A) prostaglandin F and nitric oxide B) growth hormone and ecdysone C) endocrine and exocrine glands D) hormones and target cells E) neurosecretory cells and neurotransmitters Answer: A Topic: Concept 45.2 Skill: Comprehension 7) Which of the following is a local regulator responsible for activating an enzyme that relaxes smooth muscle cells? A) nitric oxide B) prostaglandin F C) epinephrine D) A and B only E) A, B, and C Answer: A Topic: Concept 45.2 Skill: Comprehension 8) Prostaglandins are local regulators whose basic structure is derived from A) oligosaccharides. B) fatty acids.
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Chapter 45 - Biology, 7e (Campbell) Chapter 45: Hormones...

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