Biological Science
5th Edition
ISBN: 9780321743671
Author: Scott Freeman
Publisher: PEARSON
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Question
Chapter 49, Problem 6TYK
Summary Introduction
To review:
The correctness and incorrectness of the statement, “In hormone systems, feedback inhibition occurs when the presence of a hormone inhibits release of the hormone.”
Introduction:
The secretion of hormones is controlled by different mechanisms to maintain the homeostasis. Often at many instances, hormone secretion is required to be inhibited and sometimes its secretion is required to be increased. Feedback mechanisms are involved in all such regulations of secretion of hormones.
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True or False-
Down-regulation allows a target cell to decrease the amount of hormone present by removing it from circulation.
A hormone is said to have a _______ effect when it's presence enhances the effect of another hormone:
secondary
antagonistic
synergistic
permissive
“Some hormones are produced as inactive and then get converted into active hormone”
– justify this statement using an appropriate example.
Chapter 49 Solutions
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- Each steroidogenic organ has all the enzymes necessary to produce any steroid hormone. (True or false?)arrow_forwardGive two examples of feedback control of hormone activity.arrow_forwardThe hormone mechanism which results in the release of intracellular Ca++ is the: Question options: PIP 2nd messenger mechanism humoral mechanism 2nd messenger – adenylate cyclase mechanism Steroid hormone mechanismarrow_forward
- True or false: Amphetamine is both a potent reuptake inhibitor and a promoter of over-release of dopamine.arrow_forwardWhich of the following terms refers to a hormone interaction that makes the target cell responsive to or more responsive to a second hormone? Group of answer choices Antagonistic Additive Permissive Synergismarrow_forwardHormones (and/or medicines) which bind to the same receptor and have the same effects are called antagonisticarrow_forward
- Steroid hormones find their receptors inside of cells. True or Flase? This is true. Explain why this is not falsearrow_forwardTrue or false Insulin is an example of an amino acid based hormone. Insulin uses a receptor on the plasma membrane of a target cell. Insulin uses a receptor INSIDE of a target cell.arrow_forward“Since endocrine systems are the components of homeostatic feedback loop, co-ordination can be evident in hormone secretion” – explain this statement with an example.arrow_forward
- Part of the "fountain of youth" solution may lie in hormonal control. Explain which hormone and how this would work.arrow_forwardTrue or False Water-soluble hormones utilize the 2nd messenger system. True Falsearrow_forwardBe able to describe the difference between a hormone whose release is controlled by hormonal factors and a hormone whose release is controlled by humoral factors.arrow_forward
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