Life: The Science of Biology
11th Edition
ISBN: 9781319010164
Author: David E. Sadava, David M. Hillis, H. Craig Heller, Sally D. Hacker
Publisher: W. H. Freeman
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Question
Chapter 39.4, Problem 1R
Summary Introduction
To review:
The reason behind constant temperature of an ectotherm, when exposed to the environmental variations, as compared to the laboratory.
Introduction:
Ectotherms are those animals, which are not able to regulate their body temperature. Their temperature remains same as that of the external environment. For example, if temperature of the pond is 6 degrees Celsius (°C), then the body temperature of a fish would also remains the same.
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Chapter 39 Solutions
Life: The Science of Biology
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- What effect would swimming in cool water have on body temperatureregulation? What would happen if a negative-feedback mechanismdid not return the value of a variable, such as body temperature, to itsnormal range?arrow_forwardWhich of the following is a correct statement about endothermic organisms? A. Compared to ectotherms, since they cannot have their internal body temperature leave the thermoneutral zone, they are limited with regard to the types of environments they can live in. B. Endotherms do not typically use passive mechanisms for thermoregulation, such as insulation, because they utilize metabolic energy to control body temperature. C. The trait of endothermicity is a derived characteristic in mammalian animals and is not seen in other phylogenetic branches in the Metazoan Clade. D. All endotherms possess sweat glands, which allow them to conduct evaporative cooling to lower their body temperature when needed. E. None of the abovearrow_forwardIn mammals, body temperature is controlled by a structure in the brain called the hypothalamus. The hypothalamus is able to sense even slight variations in body temperature. This structure is responsible for bodily responses that include thirst, the activation of sweat glands, and the dilation of blood vessels near the skin. Each of these mechanisms works to restore body temperature to a normal range.arrow_forward
- Occasionally an individual will not be able to produce sweat and can overheat, potentially suffering a heat stroke. Within thecontext of the body temperature homeostatic mechanism, where might the disruption occur? Propose at least three ways sweatproduction might be inhibited when the body temperature rises above the set point.arrow_forwardHow does a human body respond when its internal temperature get too hotarrow_forwardGiven that heat readily transfers between an organism’s body and water, what would you predict about the temperature of the boundary layer around an animal’s body compared to the temperature of the surrounding water in cold weather?arrow_forward
- What effect and implications does temperature have on the human body and during surgery during the synthesis of bone cement?arrow_forwardIn the negative feedback system for regulation of body temperature. Identify the following. 1. Stimulus 2. Receptor 3. Control Center 4. Effector 5. Responsearrow_forwardBody temperature is homeostatically regulated around a set point. Given your knowledge of negative feedback and homeostatic control systems, predict whether narrowing or widening of the blood vessels of the skin will occur when a person exercises strenuously?arrow_forward
- Why do you think body fluid regulation is important for both plants and animals?arrow_forwardWhen a body's temperature is too low. What is the set point?arrow_forwardWhen people move to hot climates, their bodies increase sweat production to manage the heat-induced body stress. Individuals increasing sweat production implies that they have acclimatized to the change in temperature Question 1 a. False b. Truearrow_forward
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