Brachial Plexus and Cori Cycle Quiz
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Questions and Answers

What happens to lactate during the Cori Cycle?

  • It is transported to the liver and converted back to glucose. (correct)
  • It accumulates and leads to muscle contraction.
  • It is expelled from the body through respiration.
  • It is directly converted to ATP in the muscles.

    • What is the final product of lactate conversion in the liver during the Cori Cycle?

  • Pyruvate
  • Glucose (correct)
  • Glycogen
  • Acetyl-CoA

    • Which of the following best describes the relationship between pyruvate and lactate in active muscle contraction?

  • Lactate is completely converted into pyruvate during recovery.
  • Pyruvate is formed from lactate during intense exercise.
  • Pyruvate and lactate are produced simultaneously in equal amounts.
  • Lactate is formed from the reduction of pyruvate. (correct)

    • What physiological condition triggers the expansion of the Cori Cycle?

    <p>Strenuous muscle exercise leading to lactate accumulation</p> Signup and view all the answers

    Which statement about ATP production during the Cori Cycle is true?

    <p>ATP production requires glucose to be abundant.</p> Signup and view all the answers

    What is the structural organization of the brachial plexus starting from its roots?

    <p>Roots → Trunks → Cords → Divisions → Branches</p> Signup and view all the answers

    What primary role does the Cori cycle play during exercise?

    <p>It reduces lactate levels by converting it to glucose in the liver.</p> Signup and view all the answers

    Which of the following best describes the arrangement of pectoral nodes?

    <p>3-5 nodes</p> Signup and view all the answers

    Which components contribute to the formation of the brachial plexus?

    <p>C5-C8 and T1</p> Signup and view all the answers

    How does 2,3-BPG affect hemoglobin's affinity for oxygen?

    <p>It lowers the affinity for oxygen, promoting unloading in tissues.</p> Signup and view all the answers

    What effect does hypoxic condition have on 2,3-BPG levels in red blood cells?

    <p>It triggers an increase in 2,3-BPG concentration to aid in oxygen release.</p> Signup and view all the answers

    Where are the central nodes located within the axillary lymphatic nodes?

    <p>Deep to the pectoralis minor</p> Signup and view all the answers

    What is a characteristic feature of the branching structure of the brachial plexus?

    <p>It includes superior, inferior, medial, and lateral cords.</p> Signup and view all the answers

    What cycle is characterized by the conversion of 1,3-BPG to 2,3-BPG and subsequent hydrolysis?

    <p>Rapaport-Luebering cycle</p> Signup and view all the answers

    What distinguishes the Pasteur and Crabtree effects?

    <p>Pasteur effect suppresses glycolysis due to oxygen; Crabtree effect suppresses respiration due to high glucose levels.</p> Signup and view all the answers

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