39-IntAnStFmod - Positive feedback(rare eg hemorrhage(until...

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Intro to Animal Structure & Function
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Convergence on swimming shape
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When you’re small: diffusion directly with the environment works
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When you’re big: have to change
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Tissues: Epithelial Free surface Tight junctions 5-25b
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Exocrine glands
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Endocrine glands (49-7)
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Mucous membranes (47-9) Serous membranes
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Bone structure
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voluntary/striated involuntary
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(41-2) Neuron
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(41-2) Glial cells
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Intestine (47-5)
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Body cavities (Wikipedia)
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External protection
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Communication
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Transport, defense
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Regulator vs. Conformer eg: temperature
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Feedback mechanism
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Too cold What happens when too warm? Negative feedback: body temperature
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Unformatted text preview: Positive feedback (rare) eg: hemorrhage (until birth occurs -> then negative feedback imposed) Positive feedback Source of body heat: ectotherm vs. endotherm (Sometimes ectotherms can be warmer than endotherms) (internal) (external) Regulation of body heat: poikilotherm vs. homeotherm homeotherm poikilotherm (possible for ectotherms to be homeotherms) Countercurrent exchange eg: helps retain body heat Coming from the core Acclimatization More unusual fever pyrogens endotoxins interleukins torpor daily hibernation estivation...
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39-IntAnStFmod - Positive feedback(rare eg hemorrhage(until...

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