EBK LIFE: THE SCIENCE OF BIOLOGY
11th Edition
ISBN: 8220103935432
Author: Sadava
Publisher: MAC HIGHER
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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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Students have asked these similar questions
Countercurrent heat exchangers are more useful for
ectotherms to allow their body temperature to match the environment
endotherms to allow the body's core temperature to remain stable
endotherms to allow their extremities to remain at an elevated body
temperature in the cold
poikilotherms that need to have different body temperatures
ectotherms to permit them to maintain constant body temperature
Figure (2) below, shows the
relations between all factors
that should be at minimat
amount of body regulation
to achieve thermal
equilibrium, towards
establishing the
physiological basis of
comfort. in the same Figure,
symbol (B) represents:
Celius
20
25
700
600
130
300
100
100
00
70
AMBIENT TEMPERATUREF
100
110
Figure (2)
ORadiation
O Convection
OMetabolism
Evaporation
STUK BOOYLOSssor GAIN
From the list of strategies for dealing with harsh cold environments, choose those that an ectotherm would employ:
-Supercooling
-Freeze tolerance
-Dormant eggs
-Hibernation
-Torpor
Choose all that apply. Thank you
Chapter 39 Solutions
EBK LIFE: THE SCIENCE OF BIOLOGY
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Similar questions
- In 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_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_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_forward
- What 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_forwardCHOOSE THE RIGHT ANSWER :)) (MULTIPLE CHOICE) 1. Animals that rely much on the external heat sources and to ambient temperature. • Ectotherms • Endotherms • Mammals • Reptile 2. A condition wherein two objects in contact both have the same temperature. Thus no transfer of heat occurs. Thermal equilibrium Temperature Thermoregulation Temperature balance 3. Homeostasis is a system that controls an organism’s internal environment and maintains a stable, consistent state of qualities such as temperature and pH, which can be altered by either internal or external factors. Stimulus Thermoregulation Homeostatic Control Control Centre 4. Which one is the correct order of the homeostatic process?. • Stimulus, Receptors, Effect, Effectors, Control Centre • Receptors, Control Centre, Stimulus, Effect, Effectors • Stimulus, Receptors, Control Centre, Effectors, Effect • Control Centre, Effectors, Effect, Stimulus, Receptorsarrow_forwardImagine you are sick and you have fever. Sensors on the skin and brain detect this and communicate with the temperature regulatory center in the brain which then sends out a command to the sweat glands of your body as a result of which you start sweating and in about 15 mins your body temperature comes back to normal for the time being. This this feedback loop, identify the following: sensors control center effector stimulus responsearrow_forward
- Discuss the causes, signs and symptoms and treatments of three major homeostatic imbalances under each of the following systems;. a) integumentary system b) cardiovascular systemarrow_forwardWhy is it essential for organisms to maintain a relatively constant body temperature? Describe adaptations that help the organisms cope with changes in environmental temperature.arrow_forwardWhat specific evidences can be used to support the statement that “The importance of the effect of temperature on physiological function is revealed by adaptations to maintain function at different temperatures”.arrow_forward
- 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_forwarda) Name an example of an ectotherm living a homeothermic life b) Explain how how they can do thisarrow_forwardIn terms of body temperature regulation, contrast “cold-blooded” (Ectothermic or poikilothermic) and “warm-blooded” (Endothermic or homeothermic). Identify three animals that are ectothermic and three animals that are endothermic. What is the adaptive advantage of endothermy?arrow_forward
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