Metabolism and Nutrition: Overview of Metabolic Reactions
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Questions and Answers

What percentage of energy used during ATP production creates heat?

  • 40%
  • 80%
  • 70%
  • 60% (correct)

At what temperature is a naked human comfortable (thermoneutral)?

  • 84 degrees (correct)
  • 78 degrees
  • 90 degrees
  • 72 degrees

What percentage of heat is lost through conduction in humans?

  • 3% (correct)
  • 10%
  • 20%
  • 15%

Which of the following is NOT a way heat is transferred in humans?

<p>Insulation (D)</p> Signup and view all the answers

What percentage of energy expenditure is attributed to basic organ function in the body?

<p>70% (D)</p> Signup and view all the answers

How many calories are equivalent to one pound of fat?

<p>3500 (A)</p> Signup and view all the answers

What is the main purpose of the catabolic reactions described in the text?

<p>To break down molecules and release energy (A)</p> Signup and view all the answers

What is the primary fuel used by the body to produce ATP?

<p>Glucose (D)</p> Signup and view all the answers

What is the purpose of the Krebs cycle/citric acid cycle?

<p>To produce NADH and FADH2 for the electron transport chain (A)</p> Signup and view all the answers

What is the role of oxygen in the electron transport chain?

<p>Oxygen is the final electron acceptor in the chain (C)</p> Signup and view all the answers

What is the purpose of gluconeogenesis?

<p>To convert amino acids into glucose (C)</p> Signup and view all the answers

What is the primary function of lipids in the body?

<p>To provide energy through oxidation (C)</p> Signup and view all the answers

What is the purpose of the absorptive state described in the text?

<p>To digest and absorb food, with catabolism exceeding anabolism (B)</p> Signup and view all the answers

What is the primary energy source used by the body during the postabsorptive state?

<p>Glucose from glycogen stores (D)</p> Signup and view all the answers

What is the role of insulin during the absorptive state?

<p>To cause glucose to be stored and stimulate protein synthesis (B)</p> Signup and view all the answers

What is the primary energy source used by the body during starvation?

<p>Ketone bodies from the liver (B)</p> Signup and view all the answers

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