Homeostasis

Homeostasis - Homeostasis and Animal Hormones Homeostasis 1...

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1 Homeostasis and Animal Hormones Homeostasis
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2 Regulation and Feedback • Achieving homeostasis requires a regulatory system that has a specific set point , or normal value. The temperature that you set on the dial of a room's thermostat is an example of a set point. Regulatory systems typically consist of three components: a sensor, an integrator and an effector
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3 Types of Feedback Negative feedback: Positive feedback: Feedforward information Physiological Systems • Epithelial tissues • Muscle Tissues • Connective Tissues • Nervous Tissues
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4 Organs Physiological Processes Physiological processes are temperature- sensitive and increase their rate at higher temperatures. Q 10 describes temperature- sensitivity as the quotient of the rate of a reaction at one temperature divided by the rate of the same reaction at a lower temperature.
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5 Heat Exchange and the Environment Conformational homeostasis is homeostasis that occurs by conformation to the external environment. Regulatory homeostasis requires a physiological mechanism that adjusts the internal state to keep it near a specific value or within limits that can be tolerated, regardless of the external conditions. Endotherms Ectotherms Heterotherms Internal and External Temperatures
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6 Exchanging Heat with the Environment Animals exchange heat with the environment in four ways How Do Animals Regulate Body Temperature?
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7 • Many animals lie somewhere between these extremes. For example, small mammals that inhabit cold climates lose heat rapidly because their surface area is large relative to their volume. • To survive when
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This note was uploaded on 04/26/2009 for the course LIFESCI 2 taught by Professor Pires during the Winter '08 term at UCLA.

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Homeostasis - Homeostasis and Animal Hormones Homeostasis 1...

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