Ch.40 - Animal Form and FunctionSee all chapters
All Chapters
Ch.1 - Introduction to Biology
Ch.2 - Chemistry
Ch.3 - Water
Ch.4 - Carbon
Ch.5 - Biological Molecules
Ch.6 - Cells
Ch.7 - The Membrane
Ch.8 - Energy and Metabolism
Ch.9 - Respiration
Ch.10 - Photosynthesis
Ch.11 - Cell Signaling
Ch.12 - Cell Division
Ch.13 - Meiosis
Ch.14 - Mendelian Genetics
Ch.15 - Chromosomal Theory of Inheritance
Ch.16 - DNA Synthesis
Ch.17 - Gene Expression
Ch.18 - Regulation of Expression
Ch.19 - Viruses
Ch.20 - Biotechnology
Ch.21 - Genomics
Ch.22 - Development
Ch.23 - Evolution by Natural Selection
Ch.24 - Evolution of Populations
Ch.25 - Speciation
Ch.26 - History of Life on Earth
Ch.27 - Phylogeny
Ch.28 - Prokaryotes
Ch.29 - Protists
Ch.30 - Plants
Ch.31 - Fungi
Ch.32 - Overview of Animals
Ch.33 - Invertebrates
Ch.34 - Vertebrates
Ch.35 - Plant Anatomy
Ch.36 - Vascular Plant Transport
Ch.37 - Soil
Ch.38 - Plant Reproduction
Ch.39 - Plant Sensation and Response
Ch.40 - Animal Form and Function
Ch.41 - Digestive System
Ch.42 - Circulatory System
Ch.43 - Immune System
Ch.44 - Osmoregulation and Excretion
Ch.45 - Endocrine System
Ch.46 - Animal Reproduction
Ch.47 - Nervous System
Ch.48 - Sensory Systems
Ch.49 - Muscle Systems
Ch.50 - Ecology
Ch.51 - Animal Behavior
Ch.52 - Population Ecology
Ch.53 - Community Ecology
Ch.54 - Ecosystems
Ch.55 - Conservation Biology


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Animal Tissues
Metabolism and Homeostasis

Concept #1: Thermoregulation

Concept #2: Countercurrent Exchange

Additional Problems
What would be an advantage for an animal that conforms to a changing environmental condition, such as temperature?a. The animal's internal temperature would remain constant, even though the external temperature had changed.b. The animal's internal temperature would change opposite to the change in the external temperature.c. The animal would spend more time looking for food.d. The animal would spend less energy regulating its internal temperature.
In a cool environment, an ectotherm is more likely to survive an extended period of food deprivation than would an equally sized endotherm because the ectotherm ________.a. maintains a higher basal metabolic rateb. expends more energy per kilogram of body mass than does the endothermc. invests little energy in temperature regulationd. has greater insulation on its body surface
An example of an ectothermic organism that has few or no behavioral options when it comes to its ability to adjust its body temperature is a ________.a. sea star living deep in the oceanb. bass living in a farm pondc. hummingbird flying through a prairied. honeybee in a hive on a rural farm
Most land-dwelling invertebrates and all of the amphibians ________.a. are ectothermic organisms with variable body temperaturesb. alter their metabolic rates to maintain a constant body temperature of 37°Cc. are endotherms but become thermo-conformers when they are in waterd. become more active when environmental temperatures drop below 15°C
The temperature-regulating center of vertebrate animals is located in the ________.a. thyroid glandb. hypothalamusc. subcutaneous layer of the skind. liver
Marine iguanas on Galapagos rest on black rocks after coming out of the ocean. This helps them use ____ to thermoregulate.a. convectionb. conductionc. evaporationd. radiatione. metabolism
On a hot summer day your dog's tongue is hanging out her mouth. She is using ____ to thermoregulate.a. convectionb. radiationc. evaporationd. conductione. metabolism
You arrive back home from a long run on a cool February morning your faced is red. This helps you to  a. stay warm and keep your muscles working b. loose heat faster c. use evaporative cooling d. circulate more blood to your brain e. conserve body heat in the cool environment
Distinguish between ectothermic and endothermic animals. Give at least three examples of each. Discuss at least two behavioral mechanisms that endothermic animals have that aid them in thermoregulation.