Biology
11th Edition
ISBN: 9781259188138
Author: Peter H Raven, George B Johnson Professor, Kenneth A. Mason Dr. Ph.D., Jonathan Losos Dr., Susan Singer
Publisher: McGraw-Hill Education
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Question
Chapter 42, Problem 3U
Summary Introduction
Introduction:
Ectotherms are the animals whose temperature is dependent on environmental temperature. These animals have low
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Which of the following is not a way that ectotherms can change their body temperatures? a. Sweating for evaporative cooling. b. Adjusting the timing of their daily activities. c. Seek out or avoid direct sunlight. d. Huddle in a group.
Ectotherms cannot be considered homeotherms, since they do not use mechanisms to keep their internal body temperatures at a constant temperature.
A. True
B. False
Which of the following statements is True?a. Ectotherms generate most of their body heatmetabolically.b. Ectotherms include birds and mammals.c. Ectotherms experience variable body temperatures.d. Ectotherms are known as “warm-blooded” animals.
Chapter 42 Solutions
Biology
Ch. 42 - Which of the following cavities would contain your...Ch. 42 - Epithelial tissues do all of the following except...Ch. 42 - Prob. 3UCh. 42 - Connective tissues include a diverse group of...Ch. 42 - Prob. 5UCh. 42 - Prob. 6UCh. 42 - The function of neuroglia is to a. carry messages...Ch. 42 - Skeletal muscle cells are a. large multinucleate...Ch. 42 - Connective tissues, although quite diverse in...Ch. 42 - Prob. 1A
Ch. 42 - Prob. 2ACh. 42 - Suppose that an alien virus arrives on Earth. This...Ch. 42 - Homeostasis a. is a dynamic process. b. describes...Ch. 42 - Prob. 5ACh. 42 - The three types of muscle all share a. a structure...Ch. 42 - Suppose that you discover a new disease that...Ch. 42 - Which organ systems are involved in regulation and...Ch. 42 - We have all experienced hunger pangs. Is hunger a...Ch. 42 - Why is homeostasis described as a dynamic process?...
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- 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.arrow_forwardThe process of monitoring and adjusting of the body’s condition, such as temperature and pH, is known asa. exothermy.b. homeostasis.c. osmoregulation.d. ectothermy.arrow_forwardWhich of the following statements best summarizes the difference between ectothermic and endothermic organisms? Group of answer choices Ectotherms absorb external heat, but endotherms use metabolic heat to maintain a warm, steady body temperature Ectotherms are warm-blooded, but endotherms are cold-blooded Endotherms control their temperature, but ectotherms have no control over their temperature Endotherms are warm-blooded, but ectotherms are cold-bloodedarrow_forward
- Research the behaviours of a specific ectothermic animal. How do specific behaviours allow for the animal to control its body temperature in cool and hot conditions? How do specific parts of the animal’s anatomy help with thermoregulation? Use a feedback diagram to show how this animal uses thermoregulation in one of these conditions: ectotherm in cool conditions ectotherm in hot conditions Be sure to use ⊕ and ⊝ symbols in the feedback diagram to add important details.arrow_forwardWhich statement regarding thermoregulation is TRUE? ectotherms thermoregulate by moving between sunny and shady locations whereas endotherms do not thermoregulate endotherms thermoregulate by producing heat through metabolic reactions whereas ectotherms do not thermoregulate ectotherms and endotherms both thermoregulate, but they do it through different methodsarrow_forwardDescribe what happens in an endotherm and an ectotherm when outside temperature gets cold, and what happens when it gets hot.arrow_forward
- Some animals fall between endothermic and ectothermic. a) What is this thermoregulation category called? "_____thermy." b) Name one extinct animal with this kind of metabolism: c) Name one extant (living) animal which this kind of metabolismarrow_forwardAfter a long, hot run together, your friend tells you that you should dunk your head into a cooler of water to lower your body temperature more rapidly, rather than sitting and waiting to cool down. What do you think? Form a hypothesis, about how the ice-cold water might affect the rate at which your body temperature returns to normal. How could you test your hypothesis? Explain your answer.arrow_forwardEctotherms use more energy to maintain their body temperature than endotherms are better able to carry out intense, long-duration activity than endotherms have a more constant internal body temperature than endotherms gain most of their heat from external sources have a higher metabolic rate than similarly-sized endothermsarrow_forward
- Compare the costs and benefits of being an ectotherm, and describe strategies ectotherms use to adjust their body temperature.arrow_forwardWhat is the trade-off of ectotherms with regard to maintaining an internal environment that doesn’t vary much? Ectotherms are larger than endotherms because they need to have a larger surface area to volume ratio in order to either increase or lower their temperature. Ectotherms usually have fur in order to conserve heat when they live in very cold environments. Ectotherms are smaller than endotherms because they need more surface area to dissipate heat relative to their insides. Ectotherms can survive in a wider variety of habitats because they are smaller and can behaviorally adapt to a wide variety of temperatures.arrow_forwardwhich of the following situations illustrates that a homeostatic mechanism is not operating properly? a. acute high blood pressure b. normalized blood glucose levels c. dailt fluid intake equals dailty fluid output d. all of these illustrate homestatic mechanisms operating properlyarrow_forward
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