Acute Kidney Injury Causes and Mechanisms
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Questions and Answers

Which of the following is NOT a detrimental effect of sustained elevations or abnormally large increases in cytosolic free Ca2+?

  • Facilitation of ROS formation and damage in mitochondria
  • Inhibition of membrane transporters (correct)
  • Impairment of membrane function
  • Activation of degradative Ca2+-dependent enzymes

What is believed to induce cellular injury through the release of lysosomal enzymes and toxicants into the cytoplasm?

  • Sustained elevations in cytosolic free Ca2+
  • Rupture of lysosomes (correct)
  • Inhibition of energy production
  • Increased ion permeability

Which of the following is NOT a key subcellular target of aminoglycosides, unleaded gasoline, and d-limonene?

  • Mitochondria
  • Endoplasmic reticulum
  • Golgi apparatus
  • Lysosomes (correct)

Which of the following enzyme families hydrolyzes phospholipids, potentially impairing membrane function?

<p>Phospholipase A2 (PLA2) (D)</p> Signup and view all the answers

What is the primary cause of the loss of ATP, which results in the inhibition of membrane transporters that maintain internal ion balance?

<p>Inhibition of energy production (C)</p> Signup and view all the answers

Which of the following enzymes is NOT mentioned in the passage as being activated by an increase in cytosolic free Ca2+?

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

Which of the following statements about mitochondria is NOT true, according to the passage?

<p>Mitochondria play a major role in normal cellular Ca2+ regulation. (A)</p> Signup and view all the answers

What is the primary mechanism by which toxicants disrupt cell volume and ion homeostasis, according to the passage?

<p>Both A and B (C)</p> Signup and view all the answers

Which of the following statements about the distribution of Ca2+ in renal cells is true, according to the passage?

<p>The distribution of Ca2+ in renal cells is complex. (B)</p> Signup and view all the answers

Which of the following statements is NOT true, based on the information provided in the passage?

<p>Proteinases and calpains are not Ca2+-dependent enzymes. (B)</p> Signup and view all the answers

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