WHAT IS LIFE? ACHIEVE 1 TERM ACCESS CODE
5th Edition
ISBN: 9781319516116
Author: PHELAN
Publisher: MAC HIGHER
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Question
Chapter 25, Problem 10SA
Summary Introduction
To analyze: The general effects of endocrine disruptors and why their small quantities are even harmful to organisms.
Introduction:
Endocrine disruptors are chemical compounds that interfere with the normal functioning of the endocrine system and disturb life-supporting activities such as reproductive and other biological processes.
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Why has it been so difficult to regulate endocrine disrupters? How should we act in the face of uncertainty?
All of the following statements relating to endocrine signaling are correct EXCEPT:
Which of the statements is/are incorrect for hormones?
1) Hormones are non-nutrient chemicals serving as intercellular messengers.
2) Hormones are molecules of low molecular weight and are produced in traces.
3) Hormones give energy and also effect metabolism and growth activities of target cells.
4) Many hormones are produced in inactive form.
Chapter 25 Solutions
WHAT IS LIFE? ACHIEVE 1 TERM ACCESS CODE
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- Give 3 examples of probable endocrine disruptors. Why are endocrine disruptors ofconcern even at very low concentrations?Briefly describe:a) the endocrine system (what biological systems are involved), andb) 3 ways endocrine disruptors (EDs) affect the endocrine systemarrow_forwardWhat conditions affect the response of target cells in the endocrine system?arrow_forwardwhy are there scattered endocrine cells in most organs?arrow_forward
- How do receptors impart specificity within the endocrine system? What might be some advantages of having complex mechanisms for hormone action (such as second messengers)?arrow_forward*** Which of the following statements about endocrine signalling hormones is TRUE? a) They are only soluble in lipids. b) In vertebrates, they are only transported through the blood circulatory system. c) They include a group of chemicals known as pheromones. d) Each hormone can react with only one specific receptor type. e) They are also involved in synaptic signalling.arrow_forwardHow could the origin of endocrine control systems lie in ordinary cellular events? How might the earliest multicellular organisms have evolved some sort of endocrine coordination?arrow_forward
- The ability of a specific tissue or organ to respond to the presence of a hormone is dependent on a) the location of the tissue or organ with respect to the circulatory path O b) the membrane potential of the cells of the target organ c) the presence of the appropriate receptors on the cells of the target tissue or organarrow_forwardThe effect of hormones on their target is always a linear relationship of its concentration. a) This is incorrect. There is no measurable relationship between the concentration of a hormone and its effect on the target. b) This is true. Higher concentration always leads to stronger effect on their targets. c) This is incorrect. Some hormones have non-linear dose effects. d) This is true. Lower concentration always leads to weaker effects on their targets.arrow_forwardWhat general features make a chemical compound a hormone, and how do hormones achieve specificity for certain kinds of target cell?arrow_forward
- What are the broad characteristics that distinguish a chemical substance from a hormone, and how can hormones attain specificity for certain types of target cells?arrow_forwardWhy is it important for hormones to act at low concentrations and be degraded quickly?arrow_forwardWhat are the three major classes of hormones on the basis of chemical structure? How can chemicals affect endocrine systems?arrow_forward
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