21 Questions
Which process is responsible for the production of excess heat by futile cycles in the mitochondria?
H+ leak across the inner mitochondrial membrane
What is brown fat specialized for?
Heat production
What is the maximal conductance above the UCT?
Heat loss by evaporation
Which of the following is NOT a method of heat loss above the UCT?
Sweating
What is the main reason fish are ectotherms?
They are surrounded by thermally-conductive water
Which of the following is NOT a reason for regional endothermy in fish?
Improvements in vision
What is responsible for retaining heat in a small region in fish?
Counter-current heat exchanger
What is the area of the rete mirabile?
HWA Fig. 10-46
What is the main purpose of regional endothermy in fish?
To allow better performance as a predator in colder water
How many separate occasions did regional endothermy evolve in bony fishes?
Three
Which of the following is true about endothermic homeotherms?
They have a high and stable body temperature
What is the equation for power required to maintain a heated object at a set point temperature of 37 °C?
P = C(Tset - Ta)
What happens to power required to maintain the set point temperature when insulation is added?
It reduces conductance and reduces power required
What is the equation for power in the physical model when air temperature is 37 °C?
Power (W) = 0
What is the equation for power in the physical model when air temperature is not 37 °C?
Power (W) = C(Tb - Ta)
What is the equation for power in the physical model when air temperature is 37 °C?
Power (W) = 0
What is the equation for power in the physical model when air temperature is not 37 °C?
Power (W) = C(Tb - Ta)
What is the equation for power in the physical model when air temperature is 37 °C?
Power (W) = 0
What is the equation for power in the physical model when air temperature is not 37 °C?
Power (W) = C(Tb - Ta)
What is the equation for power in the physical model when air temperature is 37 °C?
Power (W) = 0
What is the equation for power in the physical model when air temperature is not 37 °C?
Power (W) = C(Tb - Ta)
Test your knowledge on endothermy and thermal regulation in organisms with this biology quiz. Learn about the differences between endotherms and ectotherms, as well as the mechanisms used by endotherms to maintain a high and stable body temperature.
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