An average adult cheetah has a metabolic mass of 44,010 grams and a resting metabolic rate of 61.77 joules per second. Based on these data, would you characterize the cheetah as an ectotherm or endotherm? Support your answer with evidence from the graph.
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- An average adult cheetah has a mass of 44,010 grams and a metabolic rate of 61.77 joules per second. Use these data to place the cheetah on the graph. Based on these data, would you characterize the cheetah as an endotherm or ectotherm? How do you know?Predict what would happen to the metabolic rate of the mouse if you increased the temperature. Predict what would happen to the metabolic rate of the mouse if you decreased the temperature (You can make this prediction with text or with lines on your graph). Support your prediction with evidence about endotherms and ectotherms. (Hint: Think about what happens to your body when you get hot or cold.)Consider the following energy demands: basal metabolism, reproduction, thermoregulation, activity, and growth; How should the energy spent toward these demands differ between an endotherm and an ectotherm of the same size?
- Endothermic homeotherms, like mammals, maintain a high internal body temperature, whereas ectothermic poikilotherms, like some reptiles, have internal body temperatures that fluctuate depending on the ambient temperature of their environment. Based on their metabolism, why might mammals have determinate growth whereas some reptiles have indeterminate growth?You are studying a large tropical reptile that has a high and relatively stable body temperature. How do you determine whether this animal is an endotherm or an ectotherm? (A) You know from its high and stable body temperature that it must be an endotherm. (B) You subject this reptile to various temperatures in the lab and find that its body temperature and metabolic rate change with the ambient temperature. You conclude that it is an ectotherm. (C) You note that its environment has a high and stable temperature. Because its body temperature matches the environmental temperature, you conclude that it is an ectotherm. (D) You measure the metabolic rate of the reptile, and because it is higher than that of a related species that lives in temperate forests, you conclude that this reptile is an endotherm and its relative is an ectotherm.Explain three factors that affect an animal’s metabolic rate.
- Please construct a model to show that the digestive, respiratory, and circulatory systems work together to supply the body cells with the glucose and oxygen needed for aerobic cellular respiration. Feel free to use words, diagrams, arrows, flowcharts, etc. to get your ideas across. Make sure you include the following information: Digestion of starch into glucose and the location(s) of digestion. Absorption of glucose into the blood and the location of absorption. Blood transporting glucose from the absorption site to the tissues. Glucose entering the tissue cells from the blood. O2 entering the blood in the lungs and the specific location of entrance in the lungs. Blood transporting O2 from the lungs into the tissues. O2 enters the tissues from the blood.Calculate the resting metabolic rate in units of kcal day-1 kg body-1 for a 60 kg nonathletic male and a 160 kg nonathletic male. Make a reasonable hypothesis as to why there is a differenceThe cell is the basic unit of all living things. Some organisms like Amoeba and bacteria are only one cell. Viruses are sub-cellular. Plants and animals are multicellular. Analyze how this fact is important when considering how different organism feed, respire, and excrete. Give two examples for each characteristic and use a multi- cellular organism and a uni-cellular (one-celled) organism to compare.
- Table 8.2. Measurement of the Metabolic Rate of a Frog at Different Environmental Temperatures. Metabolic Rate Metabolic Rate Packed in Ice (5°C) Room Temperature (20°C) Frog #1 0.05 0.30 ml 02/ hour / gm Frog #2 0.03 0.28 Frog #3 0.04 0.25 Procedure Calculate the average metabolic rate for the three frogs at each of the two temperatures. Put a dot on the graph in Figure 8.11 for each of the average values. Draw a line between those two dots. Write the word ectotherm on the line.Whales can be deep divers with seemingly no ill effects. In the article by Hooker and Baird (1999), why do they suspect the whale dives were aerobic? Why do whales lower their ascent rate when diving to these great depthAir temperature has a clear influence on the metabolic rate of eastern skunk cabbage (Symplocarpus foetidus). Draw a graph of this relationship with temperature.