Physiology Renal Function Quiz
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Questions and Answers

What is the normal range for plasma pH in the human body?

  • 7.03 - 7.04
  • 7.35 - 7.45 (correct)
  • 7.00 - 8.00
  • 6.50 - 8.50
  • If the plasma clearance of a substance is zero, what does it indicate?

  • Less reabsorbed
  • More excreted
  • Substance is not filtered (correct)
  • Increased sympathetic activity will increase renal blood flow
  • Which of the following is true regarding low Tm substances?

  • Has lower plasma clearance
  • Increased sympathetic activity will increase renal blood flow
  • Renal blood flow is maintained at a constant level
  • Less reabsorbed (correct)
  • In the human body, where is 2/3 of the total body water located?

    <p>Intracellular</p> Signup and view all the answers

    What triggers the sensation of thirst in humans?

    <p>Blood volume decreases by 3%</p> Signup and view all the answers

    Which statement about autoregulation in renal circulation is correct?

    <p>Renal blood flow is maintained at a constant level</p> Signup and view all the answers

    What is the main stimulus for the secretion and release of ADH?

    <p>Hypertonicity of the ECF</p> Signup and view all the answers

    Which force/s favor/s glomerular filtration?

    <p>Hydrostatic pressure in the Bowman's capsule</p> Signup and view all the answers

    In an antidiuretic state, what happens to the activity of the aquaporins in the DCT and CD?

    <p>Increases</p> Signup and view all the answers

    Where is the filtered HCO3 reabsorbed?

    <p>HCO3</p> Signup and view all the answers

    Under normal conditions, what is the usual urine pH?

    <p>7.40</p> Signup and view all the answers

    What maintains the hypertonicity of the renal medullary interstitial fluid?

    <p>Maintained by the thick ascending limb of the Loop of Henle which is impermeable to water</p> Signup and view all the answers

    What happens if water intake exceeds water lost from the body?

    <p>Positive water balance</p> Signup and view all the answers

    In the renal tubule, which segment is known as the diluting segment?

    <p>Thick ascending limb (Loop of Henle)</p> Signup and view all the answers

    What is the correct statement regarding reabsorption in the proximal tubule?

    <p>The second half of the proximal tubule, Na+ is symported with Cl- and glucose</p> Signup and view all the answers

    Which combination is CORRECT in terms of nephron structures?

    <p>Loop of Henle of the juxtamedullary nephrons - Countercurrent multiplier</p> Signup and view all the answers

    Where do most K+ ions undergo reabsorption after being filtered through the glomerulus?

    <p>Proximal tubule</p> Signup and view all the answers

    What is the primary abnormality in metabolic alkalosis?

    <p>$HCO_3^-$ excess</p> Signup and view all the answers

    What type of pH imbalance is likely to occur in a patient with Chronic Obstructive Pulmonary Disease (COPD)?

    <p>Respiratory acidosis</p> Signup and view all the answers

    Which statement accurately describes the renal handling of glucose?

    <p>It is passively reabsorbed in the proximal tubule</p> Signup and view all the answers

    Which substance increases passive diffusion of urea in the medullary collecting duct?

    <p>Aldosterone</p> Signup and view all the answers

    What is the tonicity of the filtrate leaving the Proximal Convoluted Tubule (PCT) and entering the thick descending loop of Henle?

    <p>Isotonic</p> Signup and view all the answers

    Where are the foot processes of the podocytes directly attached?

    <p>Glomerular capillary</p> Signup and view all the answers

    Which substance inhibits Na+ reabsorption in the renal tubules?

    <p>Dopamine</p> Signup and view all the answers

    What happens when the kidney reaches the Tm for a certain agent?

    <p>The renal tubular cells will start secreting the agent</p> Signup and view all the answers

    Which statement is NOT true of central diabetes insipidus?

    <p>Hypoglycemia</p> Signup and view all the answers

    What is the best action the kidneys can take in extreme acidosis?

    <p>Positive the urine to a pH of 8.00</p> Signup and view all the answers

    Which factor is decreased with increasing renal sympathetic nerve activation?

    <p>Water reabsorption</p> Signup and view all the answers

    Which hormone is NOT capable of enhancing reabsorption in the DCT?

    <p>ANP</p> Signup and view all the answers

    In which part of the renal tubules is a large proportion of Na+ reabsorbed in a patient with increased aldosterone?

    <p>$Urea$</p> Signup and view all the answers

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