Metabolism and Nutrition: Overview of Metabolic Reactions

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What percentage of the energy used during ATP production is converted into heat?

10%

90%

30%

60% (correct)

Which mode of heat transfer accounts for the largest percentage of heat loss in the human body?

Radiation (correct)

Conduction

Convection

Evaporation

What is the approximate percentage of energy expended for thermoregulation in the human body?

10% (correct)

20%

5%

15%

Which nutrient requires the most energy to break down in the body?

Proteins Signup and view all the answers

Which of the following is not a water-soluble vitamin?

Vitamin K Signup and view all the answers

What is the approximate caloric equivalent of 1 pound of fat?

3500 calories Signup and view all the answers

Which of the following is true about catabolic reactions?

They release energy by breaking down molecules Signup and view all the answers

What happens during glycolysis?

Glucose is converted to pyruvate, producing a net gain of 2 ATP molecules Signup and view all the answers

What is the primary function of the electron transport chain (ETC)?

To produce ATP through oxidative phosphorylation Signup and view all the answers

Which of the following is true about ketogenesis?

It produces ketone bodies as an alternative fuel source when glucose is low Signup and view all the answers

What is the primary function of the urea cycle?

To remove excess nitrogen from amino acid breakdown Signup and view all the answers

During the absorptive state, which of the following is true?

Glucose is being stored as glycogen Signup and view all the answers

What is the primary role of the Krebs cycle?

To generate high-energy electron carriers (NADH and FADH2) for the electron transport chain Signup and view all the answers

Which of the following is true about lipogenesis?

It is the process of synthesizing lipids from excess acetyl CoA when glucose is plentiful Signup and view all the answers

What is the primary role of gluconeogenesis?

To produce glucose from non-carbohydrate precursors like pyruvate and lactate Signup and view all the answers

Which of the following is true about the starvation state?

Ketone bodies become the primary energy source after several days Signup and view all the answers

Metabolism and Nutrition: Overview of Metabolic Reactions

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Questions and Answers

What percentage of the energy used during ATP production is converted into heat?

Which mode of heat transfer accounts for the largest percentage of heat loss in the human body?

What is the approximate percentage of energy expended for thermoregulation in the human body?

Which nutrient requires the most energy to break down in the body?

Which of the following is not a water-soluble vitamin?

What is the approximate caloric equivalent of 1 pound of fat?

Which of the following is true about catabolic reactions?

What happens during glycolysis?

What is the primary function of the electron transport chain (ETC)?

Which of the following is true about ketogenesis?

What is the primary function of the urea cycle?

During the absorptive state, which of the following is true?

What is the primary role of the Krebs cycle?

Which of the following is true about lipogenesis?

What is the primary role of gluconeogenesis?

Which of the following is true about the starvation state?

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Metabolism and Nutrition: Overview of Metabolic Reactions

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