Lecture 13 animal form and function posted

Lecture 13 animal form and function posted -...

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BIO 311D LECTURE 13 Animal form and function
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Basics Tissues Metabolism Thermoregulation Homeostasis
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Surface area to volume!
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Environmental constraints on animal form
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Animal tissues Epithelial Connective Nervous Muscle Review – Chapter 7, Fig. 7.7 and 7.17
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Epithelial tissues
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Connective tissues
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Muscle tissue
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Bioenergetics
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Metabolic rate “The sum of all the energy-requiring biochemical reactions occurring over a given time interval.” Measured by: rate of heat loss production of carbon dioxide / amount of oxygen consumed rate of food consumed (known energy content)
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Endothermy vs. Exothermy Heat generated by metabolism Body temp. must be maintained to sustain life Lots of energy required Activity can be intense and of long duration Heat from environment Body temp. can vary Not much energy needed Incapable of intense activity over a long time
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Metabolic rate is inversely proportional to body size One gram mouse 20x one gram elephant In reptiles as well
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Thermoregulation
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Insulation Circulatory adaptations
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Unformatted text preview: Vasoconstriction Vasodilation Countercurrent heat exchanger Heat exchange rate Evaporative cooling Behavior Metabolic rate change Thermoregulation in mammals and birds High metabolism Increasing heat production Muscle activity Nonshivering thermogenesis Insulation Vasoconstriction Countercurrent heat exchange Decreasing body heat Vasodilation Evaporative cooling Body temperature increase for increase of the temperature gradient Thermoregulation in mammals and birds Thermoregulation in amphibians and reptiles Amphibians lose more moisture through skin Reptiles Thermoregulation in fish and invertebrates Fish - conformers Invertebrates conformers and regulators Many endothermic Summary of thermoregulation Heat gain or loss is by : 1. 2. 3. 4. Heat gain or loss is balanced by: 1. 2. 3. 4. Homeostasis 5 components Stimulus Receptor Control center Effector Response...
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Lecture 13 animal form and function posted -...

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