Loose-leaf Version for What Is Life? A Guide to Biology 4E & LaunchPad for What is Life? A Guide to Biology 4E (Twelve Month Access)
4th Edition
ISBN: 9781319154639
Author: Jay Phelan
Publisher: W.H. Freeman & Co
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Chapter 21, Problem 8MC
Summary Introduction
Introduction:
Endotherms generate their own body heat and are sometimes called ‘warm-blooded’ organisms.
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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.
Which of the following is NOT a mechanism to maintain the body’s internal temperature?
A. Fluid has a high capacity for heat, so it requires a great deal of energy to raise its temperature.
B. Warmed fluids from the body’s surface return to the body’s core, thus heating the body.
C. Fluid acts as a coolant by increasing the blood flow from the warm body core to the peripheral tissue, thus cooling the body.
D. Fluid is evaporated as sweat from the skin’s surface, thus cooling the body.
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.
Chapter 21 Solutions
Loose-leaf Version for What Is Life? A Guide to Biology 4E & LaunchPad for What is Life? A Guide to Biology 4E (Twelve Month Access)
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- which of the following statements are true about homeostasis? Select all that apply. a. The selective permeability of the cell membrane allows for thermoregulation. b. Homeostasis is an organism‘s way of maintaining constant and balanced internal processes. c. Ectotherms rely on environmental heat to maintain homeostasis. d. Homeostasis works by a system of positive feedback.arrow_forwardHeat exchange with the environment depends on the surface area-to-volume ratio of the body. Assuming that the body shape of an animal is at least somewhat spherical, a considerable decrease in body size would _______ the surface area-to-volume ratio, and the ability to exchange heat with the environment would _______. A. increase; increase B. increase; stay about the same C. increase; decrease D. decrease; increase E. decrease; stay about the samearrow_forwardThe Mojave Desert of the western United States is characterized by a hot, dry climate. Scientists predict that temperatures in this region will increase by an average of 4.7° F over the next 30 years. Birds found here (like ground-dwelling roadrunners) are endotherms and have many adaptations to reduce the amount of heat absorbed into the body while active in the daytime. If temperatures increase in this area as predicted, how might the plumage (the feathers covering the body) of these roadrunners change under the influence of natural selection? 1:The plumage will likely become longer and increase heat absorption into the body. 2:The plumage will likely become darker and increase heat absorbed from the environment. 3:The plumaqe will likely become lighter and increase heat reflected away from the body. 4:The plumage will likely become thicker and increase the amount of heat trapped by the body.arrow_forward
- What is the most likely homeostatic response to an increase in environmental temperature? A. Blood vesse! Constriction 5. B. Producing sweat C. Shivering and muscle contraction D. Goose bump formation 6. What could happen due to a failure in homeostasis? A. The accumulation of waste products B. The loss of excess water from the body C. Maintaining excess levels of sugar in the body D. All of the above are potential outcomes of failure of homeostasis. 7. Which of the following is true when the body is under homeostasis? A. The body cannot generate its own heat in very cold conditions B. The body is under dynamic equilibrium C. The body is able to self-sustain without anything from the environment D. None of the o' ve *46arrow_forwardEctotherms: They are otherwise called wanton creatures. Fishes, creatures of land and water, reptiles are ectotherms. Endotherms - they are otherwise called warm-blooded creatures. For example, birds and vertebrates are endotherms. Impact of temperature on endotherms - When the temperature is low, endotherms produce more hotness to keep the internal heat level steady. So endotherms are not influenced by the temperature of the climate. Impact of temperature on ectotherms - The temperature of the climate influences ectotherms. At the point when the temperature is high, ectotherms grow quicker. At the point when the temperature is low, they might foster injury. Provide biological reasoning for your claim about endotherms. Consider addressing the following: -Why do you see the data you see? -What is happening at the molecular level? -What are the benefits and disadvantages of being an endotherm. -How do endotherms maintain homeostasis?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
- light stimulus Refer to the figure below to answer the question that follows: 40 Bobcat (endotherm) H Enake (netother) 10 10 40 20 30 Ambient temperature (°C) 51. The diagram above shows the body temperature vs ambient temperature for a bobcat and snake. The Despite this extra energy animal that is expending more energy at lower temperatures is the expenditure, the payoff is that a. snake; it can be active during a wide range of temperatures b. bobcat; it can conserve energy c. snake; it can conserve energy d. bobcat; it can be active during a wide range of temperatures snake; it can hide for longer in Mr. vonk's physics room e. Body temperature (°C) 20arrow_forwardEndothermic animals can maintain consistent temperature conditions by generating, main- taining, and regulating their body heat. Under cold conditions, more body heat becomes lost to the environment. Endothermic ani- mals rely on different mechanisms that allow them to maintain their body heat. Which of the following mechanisms that occur in endothermic animals does not describe a mechanism by which they maintain their body heat under these types of conditions? A B с D Some endothermic animals hibernate during extreme environmental conditions, which decreases the rate of metabolic reaction and decreases heat loss. The tissues of the blood vessels of many endothermic animals can dilate and move closer to the skin, allowing for heat to move more readily into the environment. Shivering, which can occur involuntarily in most endothermic animals, produces rapid muscle contractions, which increase the rate of cellular respiration and thereby increase heat production. Layers of densely packed…arrow_forwardWhich of the following is a way that the body determines how much of a certain chemical, protein, enzyme, or response is needed to maintain homeostasis? A. Resource limitation, B. Feedback inhibition, C. Kickback inhibition, D. Signal looparrow_forward
- Which of the following is an endotherm? a. a shark b. a frog c. a monkey d. a snakearrow_forwardYou 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_forwardWhat could happen due to a failure in homeostasis? Select one: a. The accumulation of waste products. b. The loss of excess water from the body. c. Maintaining excess levels of sugar in the body. d. All of the above are potential outcomes of failure of homeostasis.arrow_forward
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