19 Questions
What type of relationship can be seen between ectotherms and their environment?
All of the above
Which factor influences the metabolic rate of cold-acclimated fish?
Altered Krebs cycle enzymes
In endothermy, what does the thermoneutral zone (TNZ) represent?
Range of temperatures where body temperature remains constant
What is the consequence when the animal's body temperature is higher than the ambient temperature?
Heat moves out of the animal's body
What is a characteristic of homeothermy in terms of physiological adaptations?
Metabolism changing with changes in body temperature
Which group shows an evolutionary adaptation in response to environmental changes?
Both ectotherms and endotherms
What is the term for an animal that relies on metabolic production of heat to warm its tissues?
Endotherm
Which term describes an animal whose body temperature is determined by external conditions?
Poikilotherm
What is the mechanism by which an organism maintains a relatively constant tissue temperature called?
Thermoregulation
Which of the following terms best describes the regional differences in body temperatures within a single individual?
Heterothermy
What do we call the process where an organism adjusts its metabolic rate to compensate for changes in temperature?
Metabolic compensation
Which term best describes an animal that thermoregulates by physiological means rather than relying on external conditions?
Endotherm
What is the formula for heat production in animals to prevent heat loss?
M = C(TB - TA)
What is the term for the resistance to dry heat loss often referred to as insulation?
Resistance
In cold environments, what happens to the metabolic rate of animals as ambient temperature decreases?
It increases
Which physiological adaptation becomes maximized in animals when exposed to temperatures below their thermal neutral zone (TNZ)?
Insulation
Which of the following does NOT play a role in nonshivering thermogenesis in mammals?
Use of hydrogens in electron transport chain (ETC)
What physiological process enables heat conservation in animals by cooling appendages to limit overall heat loss?
Countercurrent heat exchange
Which of the following is a form of insulation utilized by animals to regulate their body temperature?
Feathers
Test your knowledge on the relationship between ectotherms and their environment, focusing on how acclimation influences metabolic rate through altered cell biochemistry. Questions cover the impact on rate-limiting enzymes in the Krebs cycle and electron transport chain, with examples involving cold-acclimated fish.
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