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

What triggers the sensation of thirst in humans?

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

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

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

Which force/s favor/s glomerular filtration?

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

Where is the filtered HCO3 reabsorbed?

<p>HCO3 (D)</p> Signup and view all the answers

Under normal conditions, what is the usual urine pH?

<p>7.40 (D)</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 (C)</p> Signup and view all the answers

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

<p>Positive water balance (A)</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) (C)</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 (B)</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 (C)</p> Signup and view all the answers

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

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

What is the primary abnormality in metabolic alkalosis?

<p>$HCO_3^-$ excess (A)</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 (C)</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 (D)</p> Signup and view all the answers

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

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

Where are the foot processes of the podocytes directly attached?

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

Which substance inhibits Na+ reabsorption in the renal tubules?

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

Which statement is NOT true of central diabetes insipidus?

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

Which factor is decreased with increasing renal sympathetic nerve activation?

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

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

<p>ANP (B)</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>$Urea$ (A)</p> Signup and view all the answers

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