The thermoneutral zone is the range of body temperatures over which an animal can maintain a constant basal metabolic rate. Which of the following patterns about thermoregulation is true? A.Below the lower critical threshold, animals must decrease their metabolic rate in order to maintain body temperature B.Animals living in the arctic have higher critical temperatures than do animals in the tropics C.When outside temperatures are below the lower critical temperature for an animal, animals in the arctic increase their metabolic rate faster than do animals in the tropics D.All of the above E.None of the above Observed(B)ExtrapolatedARCTICTROPICAL400Marmoset Unclothed humanJungle ratNight monkeyPolarGroundRaccoonbear cub squirrelLemming Weasel Coati300SlothEskimodog pup200Arctic fox100and largermammalsBasal metabolic rate = 100-70-50-30-101030Lowest temperature in ArcticBody temperatureEnvironmental temperature ("C)ECOLOGY e, Figure 4.16 (Part 2)o017 Sinaaer Aociates, Inc.Metabolic rate (normalized to basal)

Thermoregulation is a process that allows your body to maintain its core internal temperature.

Answered: The thermoneutral zone is the range of…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

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Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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The thermoneutral zone is the range of body temperatures over which an animal can maintain a constant basal metabolic rate. Which of the following patterns about thermoregulation is true?

	A.	Below the lower critical threshold, animals must decrease their metabolic rate in order to maintain body temperature
	B.	Animals living in the arctic have higher critical temperatures than do animals in the tropics
	C.	When outside temperatures are below the lower critical temperature for an animal, animals in the arctic increase their metabolic rate faster than do animals in the tropics
	D.	All of the above
	E.	None of the above

Observed
(B)
Extrapolated
ARCTIC
TROPICAL
400
Marmoset Unclothed human
Jungle rat
Night monkey
Polar
Ground
Raccoon
bear cub squirrel
Lemming Weasel Coati
300
Sloth
Eskimo
dog pup
200
Arctic fox
100
and larger
mammals
Basal metabolic rate = 100
-70
-50
-30
-10
10
30
Lowest temperature in Arctic
Body temperature
Environmental temperature ("C)
ECOLOGY e, Figure 4.16 (Part 2)
o017 Sinaaer Aociates, Inc.
Metabolic rate (normalized to basal)

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