By Lauralee Sherwood
Animal body structure: From Genes to Organisms 2d version
Keep up with todays quick advances within the organic sciences with ANIMAL body structure: FROM GENES TO ORGANISMS 2E with CourseMate!
With insurance of animal species that may be correct in your animal-related occupation, this biology textual content offers you the instruments you want to succeed.
Boxes came upon during the textual content equivalent to Molecular Biology and Genomics, past the fundamentals, demanding situations and Controversies, Unanswered Questions, and a better examine model provide you with examples of state-of-the-art learn and assist you see how what you're studying applies to the genuine world.
Check Your figuring out questions after each one significant part assist you assessment the most rules as you learn. every one bankruptcy then ends with a bankruptcy precis, a collection of overview, Synthesize, and study questions, and a listing of urged Readings for extra examine.
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Additional resources for Animal Physiology From Genes to Organisms
6 Describe how reset and positive-feedback systems create useful change. 7 Organization of Regulatory and Organ Systems Control of an animal’s functions is often—erroneously— portrayed as a centralized command system with the brain and endocrine systems regulating everything. In fact, such a design would be needlessly cumbersome and slow because every tiny response needed by each cell or tissue for homeostasis would require these events: a signal to a central command organ; a decision; a return signal; and finally a local response.
By enhancing the basic ability of cells to respond to changes in their environments, neurons generate and transmit to other regions electrical impulses that relay information about stimuli such as light, temperature, nutrient concentrations, and so on. Copyright 2011 Cengage Learning. All Rights Reserved. May not be copied, scanned, or duplicated, in whole or in part. Due to electronic rights, some third party content may be suppressed from the eBook and/or eChapter(s). Editorial review has deemed that any suppressed content does not materially affect the overall learning experience.
Evolution has also come up with two other mechanisms for regulating useful nonhomeostatic change, which we mention frequently in later chapters: • Reset system: one that changes the set point of a negative-feedback system, in a temporary, permanent, or cyclic fashion (Figure 1-10a). Fever is an example of a temporary reset of body temperature. At sexual maturity in a mammal, sex hormone concentrations are permanently reset to higher levels. Annual hibernation (such as by a squirrel) and many reproductive cycles are additional examples of cyclical resets regulated by internal biological clocks (see Chapter 7).