Macronutrients and Nutrients in Biochemistry Chapter 27 Quiz
39 Questions
1 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the function of glycine in the body?

  • Principal inhibitory transmitter in the brain stem and spinal cord
  • Required for detoxification reactions in the liver (correct)
  • Precursor of the neurotransmitter serotonin
  • Occurs at every 3rd amino acid residue in collagen

Which amino acid is a precursor of nitric oxide?

  • Histidine
  • Arginine (correct)
  • Lysine
  • Tryptophan

What is the main function of arginine in the body?

  • Precursor of NO and creatine (correct)
  • Acts as an ammonia scavenger
  • Principal inhibitory transmitter in the brain stem and spinal cord
  • Required for detoxification reactions in the liver

Which amino acid interacts with glutamine during blood clotting?

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

What is the primary function of tryptophan in the body?

<p>Precursor of the neurotransmitter serotonin (D)</p> Signup and view all the answers

In terms of nutritional quality, what distinguishes first-class protein from second-class protein?

<p>Availability and content of indispensable amino acids (A)</p> Signup and view all the answers

What does PDCAAS stand for in the context of evaluating protein quality?

<p>Protein Digestibility-Corrected Amino Acid Scoring (D)</p> Signup and view all the answers

Which protein is mentioned as lysine deficient but methionine rich?

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

What is the main characteristic of Kwashiorkor, a form of Protein-Energy Malnutrition (PEM)?

<p>Pure protein deficiency (C)</p> Signup and view all the answers

In which scenario would you expect a negative nitrogen balance according to the text?

<p>Inadequate dietary protein during physiological stress (A)</p> Signup and view all the answers

What is the approximate daily protein requirement for pregnant or lactating women, according to the text?

<p>~30g/day (D)</p> Signup and view all the answers

Which physiological response leads to an accelerated rate of lipolysis and proteolysis?

<p>Release of glucocorticoids and interleukin-6 (B)</p> Signup and view all the answers

What can happen if the kidneys cannot concentrate urine?

<p>Dehydration (B)</p> Signup and view all the answers

Why do high protein diets increase water loss?

<p>They cause competition for absorption among amino acids (B)</p> Signup and view all the answers

What risk do infants face due to their immature kidneys?

<p>Dehydration (B)</p> Signup and view all the answers

Why is it concerning when weight lifters take supplements of arginine?

<p>Arginine competes with lysine for absorption, upsetting amino acid balance (C)</p> Signup and view all the answers

What can trigger food allergies according to the text?

<p>Absorption of incompletely digested proteins (A)</p> Signup and view all the answers

How many essential amino acids are there according to the text?

<p>9 (A)</p> Signup and view all the answers

Which amino acid is considered semi-essential?

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

What is the main function of glycine in the body as mentioned in the text?

<p>Detoxifies reactions in the liver (B)</p> Signup and view all the answers

Which amino acid is a precursor of heme synthesis, inhibitory transmitter in the brain stem, and occurs frequently in collagen?

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

What is the primary role of lysine residue when factor X111a converts fibrin polymer?

<p>Forms high tensile strength clots (C)</p> Signup and view all the answers

In protein metabolism, what role does histidine play as mentioned in the text?

<p>Forms an inhibitory transmitter in the brain (D)</p> Signup and view all the answers

What is the main physiological function of arginine as described in the text?

<p>Serves as a precursor of nitric oxide (D)</p> Signup and view all the answers

Which amino acid serves as a fuel for intestinal enterocytes and plays a crucial role in nitrogen transport?

<p>Glutamine (C)</p> Signup and view all the answers

Which measure is used to evaluate protein quality based on amino acid profile and digestibility?

<p>Protein-Deficiency Corrected Amino Acid Scoring (PDCAAS) (C)</p> Signup and view all the answers

What condition is characterized by inadequate dietary protein intake and lack of an essential amino acid during stress like trauma, burns, illness, or surgery?

<p>Protein-Energy Malnutrition (PEM) (C)</p> Signup and view all the answers

What is the primary reason many individuals suffering from Protein-Energy Malnutrition (PEM) die from secondary infection rather than starvation?

<p>Diminished Immune Response (D)</p> Signup and view all the answers

What is the approximate daily protein requirement for athletes according to the text?

<p>$1.0g/kg$ of body weight (D)</p> Signup and view all the answers

Which scenario would result in a negative nitrogen balance according to the text?

<p>Losses exceeding intake (B)</p> Signup and view all the answers

In what form of Protein-Energy Malnutrition (PEM) do individuals typically experience a diminished cell-mediated immune response?

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

What is the potential consequence of using supplements of arginine and lysine together?

<p>Upset amino acid balance in the body (C)</p> Signup and view all the answers

Why are high protein diets associated with increased water loss?

<p>Protein metabolism leads to increased urea elimination (C)</p> Signup and view all the answers

How do immature kidneys of infants differ from mature kidneys in terms of urine concentration?

<p>Immature kidneys excrete more fluid (C)</p> Signup and view all the answers

What role does glutamine play during the clotting process?

<p>Aids in platelet aggregation (B)</p> Signup and view all the answers

Why is it problematic when protein fragments cause allergies?

<p>They enhance immune response (B)</p> Signup and view all the answers

How does urea elimination relate to the absorption of amino acids with similar structures?

<p>Urea competes with amino acids for absorption (C)</p> Signup and view all the answers

What is a concern related to the absorption of protein fragments without complete digestion?

<p>Triggering of food allergies (B)</p> Signup and view all the answers

How do essential and non-essential amino acids differ?

<p>Essential amino acids cannot be produced by the body. (C)</p> Signup and view all the answers

More Like This

Use Quizgecko on...
Browser
Browser