Study Guide for Campbell Biology
11th Edition
ISBN: 9780134443775
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece, Martha R. Taylor, Michael A. Pollock
Publisher: PEARSON
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Textbook Question
Chapter 45, Problem 2IQ
Compare negative and positive feedback in the regulation of hormonal pathways and give an example of each.
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Feedback loops regulate the release of hormones in either a positive or negative
loop. Consider this example: The hypothalamus releases thyrotropin releasing
hormone (TRH), which stimulates the pituitary to release the TSH (thyroid
stimulating hormone). TSH then stimulates thyroid gland to release thyroid hormone. When elevated levels of thyroid hormone are detected by the hypothalamus and pituitary further release of TRH and TSH is suppressed. a. What type of feedback loop is described and briefly explain that type of Feedback loop?
Feedback loops regulate the release of hormones in either a positive or negative loop. Consider this example: The hypothalamus releases thyrotropin releasing hormone (TRH), which stimulates the pituitary to release the TSH (thyroid stimulating hormone). TSH then stimulates thyroid gland to release thyroid hormone. When elevated levels of thyroid hormone are detected by the hypothalamus and pituitary further release of TRH and TSH is suppressed. a. What type of feedback loop is described and briefly explain that type of feedback loop? *
Your answer
(LENGHT DOESN'T MATTER, I NEED IT ASASP PLEASE)
Describe how blood sugar (e.g. glucose plasma concentration) is regulated with the hormones, insulin, and glucagon. For this feedback loop, identify the following components of the feedback loop: stimulus, receptor, control center, efferent pathway, effector, and response. Be comfortable with this feedback loop to be able to describe the effects of changing various components of the feedback loop.
Chapter 45 Solutions
Study Guide for Campbell Biology
Ch. 45 - Label the parts of the following diagrams,...Ch. 45 - Compare negative and positive feedback in the...Ch. 45 - What is a tropic hormone? Give some examples.Ch. 45 - The thyroid gland produces two hormones, thyroxine...Ch. 45 - Prob. 5IQCh. 45 - Prob. 1SYKCh. 45 - What is a hormone cascade pathway? Describe how...Ch. 45 - Prob. 1TYKMCh. 45 - Prob. 2TYKMCh. 45 - Prob. 3TYKM
Ch. 45 - Prob. 4TYKMCh. 45 - Prob. 5TYKMCh. 45 - Prob. 6TYKMCh. 45 - Prob. 7TYKMCh. 45 - Prob. 8TYKMCh. 45 - Prob. 9TYKMCh. 45 - Prob. 10TYKMCh. 45 - Prob. 1TYKCh. 45 - Prob. 2TYKCh. 45 - Prob. 3TYKCh. 45 - The activation of helper T cells during an immune...Ch. 45 - Prob. 5TYKCh. 45 - Prob. 6TYKCh. 45 - Which of the following hormones is secreted by the...Ch. 45 - Prob. 8TYKCh. 45 - Prob. 9TYKCh. 45 - Prob. 10TYKCh. 45 - Prob. 11TYKCh. 45 - The anterior pituitary a. stores and releases...Ch. 45 - Prob. 13TYKCh. 45 - Prob. 14TYKCh. 45 - Prob. 15TYKCh. 45 - Prob. 16TYKCh. 45 - Prob. 17TYKCh. 45 - Prob. 18TYKCh. 45 - Prob. 19TYKCh. 45 - Prob. 20TYK
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- Compare the endocrine and nervous control systems and explain how they act together.arrow_forwardDescribe in detail the three modes of regulation local, neural and hormonal?arrow_forwardWhat is the importance of feedback systems in the control of hormonal output? Offer an example of a hormonal feedback pattern.arrow_forward
- Feedback loops regulate the release of hormones in either a positive or negative loop. Consider this example: The hypothalamus releases thyrotropin releasing hormone (TRH), which stimulates the pituitary to release the TSH (thyroid stimulating hormone). TSH then stimulates thyroid gland to release thyroid hormone. When elevated levels of thyroid hormone are detected by the hypothalamus and pituitary further release of TRH and TSH is suppressed. b. What would happen to the levels of TRH and TSH if a tumor of the thyroid gland were discovered resulting in uncontrolled release of the thyroid hormone from the tumor itself? * Your answer (LENGHT DOESN'T MATTER, I NEED IT ASASP PLEASE)arrow_forwardIn a essay explain the three modes of regulation which are local, neural, and hormonal.arrow_forwardList the similarities among and differences between the nervous and endocrine systems with regard to the control of homeostasis.arrow_forward
- Give two examples of hormones (including their glands of origin and action) that play major roles in homeostatic process in the body?arrow_forwardWhich of the following statements is not true of the endocrine system? Select one: A. Most of its components are not anatomically connected, unlike most other systems of the body. O B. It is one of two major regulatory systems of the body O C. It is an important regulator of homeostatic mechanisms. O D. The nervous and endocrine systems often overlap in function. O E. It is composed of glands that secrete chemical messengers through ducts into the blood.arrow_forwardDiagram an endocrine pathway, such as parathyroidregulation of blood-calcium levels, which maintainshomeostasis of a bodily function by means of negativefeedback.arrow_forward
- Explain with one example the feedback mechanism in one of the endocrine glands.arrow_forwardExplain the basis of the fact that nervous control is rapid but of short-duration, whereas hormonal control takes time to start but the effects last a long time. How would body function change if the rate of hormone degradation increased? Decreased?arrow_forwardWhich statement best describes the relationship between the Endocrine and Nervous Systems? Both systems work with the Urinary System to maintain acid-base balance in the blood Both systems regulate hair growth, temperature regulation, and hydration Both systems modulate the stress response, sleep/wake cycles, and metabolism Both systems work with the Urinary System to activate Vitamin Darrow_forward
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