PRINCIPLES OF LIFE
PRINCIPLES OF LIFE
3rd Edition
ISBN: 9781319017712
Author: HILLIS
Publisher: MAC HIGHER
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Chapter 28.3, Problem 4RA
Summary Introduction

To explain: Does the negative feedback system always have a diminishing effect on the controlled variable.

Introduction: Homeostasis is defined as the ability to maintain internal stability in an organism to recompense for changes in the external environment. For example, if the thyroid hormone level in the blood is high, the hypothalamus stops secreting the thyrotropin-releasing hormone (TRH) as well as the pituitary gland stops releasing thyroid-stimulating hormone (TSH). These hormones are responsible for inducing the thyroid gland to secrete thyroid. As a result, a fall of TRH, TSH, and thyroid level in the blood takes place.

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