Body Temperature Regulation Video Lessons

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Problem: Select the true statements regarding non-shivering thermogenesis.a) In non-shivering thermogenesis, heat is dispersed from the energy produced in electron transport. b) Thermogenin decreases the proton gradient by enabling protons to reenter the mitochondrial matrix without taking part in ATP synthesis. c) Without brown fat, or brown adipose tissue, it would be difficult for adults to maintain proper body temperature. d) Norepinephrine stimulates the hydrolysis of fatty acids, which activate the uncouple protein. e) ATP synthase can be bypassed in brown adipocytes.

FREE Expert Solution

a) In non-shivering thermogenesis, heat is dispersed from the energy produced in electron transport.

TRUE. Energy from electron transport (chemiosmosis) is dissipated as heat instead.


b) Thermogenin decreases the proton gradient by enabling protons to reenter the mitochondrial matrix without taking part in ATP synthesis. 

TRUE. Proton motive force is uncoupled from ATP synthesis.

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Problem Details

Select the true statements regarding non-shivering thermogenesis.

a) In non-shivering thermogenesis, heat is dispersed from the energy produced in electron transport. 

b) Thermogenin decreases the proton gradient by enabling protons to reenter the mitochondrial matrix without taking part in ATP synthesis. 

c) Without brown fat, or brown adipose tissue, it would be difficult for adults to maintain proper body temperature. 

d) Norepinephrine stimulates the hydrolysis of fatty acids, which activate the uncouple protein. 

e) ATP synthase can be bypassed in brown adipocytes.


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