Renal Module: Nephrology and General Internal Medicine
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Questions and Answers

What is the main function of the kidney?

  • Storing nutrients
  • Producing blood cells
  • Regulating volume, osmolarity, mineral composition, and acidity (correct)
  • Controlling body temperature

Which type of feedback loop is mainly observed in nephrology?

  • Positive feedback loops (correct)
  • Neutral feedback loops
  • Feedforward loops
  • Negative feedback loops

What process does the kidney involve to maintain homeostasis in the body?

  • Regulation and excretion (correct)
  • Blood pressure elevation
  • Positive filtration
  • Balance of blood cells

What is a characteristic of positive feedback loops?

<p>Response to a change intensifies the original change (B)</p> Signup and view all the answers

How does the kidney help in preventing edema?

<p>By regulating volume and excreting excess intake (D)</p> Signup and view all the answers

What is a major renal function related to the excretion of metabolic waste products?

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

Which of the following is a function of the endocrine system related to the kidneys?

<p>Production of erythropoietin (B)</p> Signup and view all the answers

What triggers the secretion of erythropoietin in the kidneys?

<p>Low O2 tension in the kidneys (C)</p> Signup and view all the answers

Which substance is NOT a metabolic waste product excreted by the kidneys?

<p>Bilirubin from liver metabolism (A)</p> Signup and view all the answers

What is the function of renin in the kidneys?

<p>Regulate blood pressure (B)</p> Signup and view all the answers

What basic principle explains why the osmolarities of intracellular fluid (ICF) and extracellular fluid (ECF) remain almost exactly equal to each other?

<p>Water moves rapidly across cell membranes (B)</p> Signup and view all the answers

What happens to the number of osmoles in the ECF or ICF according to the text?

<p>Remains constant unless solutes are added or lost (D)</p> Signup and view all the answers

Which organ is primarily responsible for maintaining homeostasis by ensuring excretion, regulation, and secretion?

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

What are the most closely regulated parameters mentioned in the text?

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

Why can't osmolality and tonicity be used interchangeably?

<p>Because tonicity refers to the concentration of water relative to a cell, while osmolality refers to solute concentration (A)</p> Signup and view all the answers

What is the primary determinant of the rate of angiotensin II formation?

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

Which of the following statements about urine output is true?

<p>UNa may vary from 0.05g/24h to 20g/24h (A)</p> Signup and view all the answers

What is the major extracellular component in the body?

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

What separates the cells from the capillary lumen in the body?

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

What is true regarding osmosis?

<p>It involves movement of water across a selectively permeable membrane (B)</p> Signup and view all the answers

What does tonicity refer to?

<p>The capacity of a solution to cause a change in cell volume (D)</p> Signup and view all the answers

What is true about isoosmotic and isotonic solutions?

<p>They cause changes in cell volume (B)</p> Signup and view all the answers

Which factor determines fluid exchange between plasma and interstitial fluid?

<p>Hydrostatic and oncotic pressures (C)</p> Signup and view all the answers

What does osmolality measure?

<p>Number of osmoles/Kg of water (B)</p> Signup and view all the answers

When comparing solutions based on tonicity, what does an isotonic solution mean?

<p>The solution has the same osmolarity as another solution. (D)</p> Signup and view all the answers

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