Urinary System: Filtration and Dehydration
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Questions and Answers

What is responsible for an increase in Ca++ reabsorption and blocking phosphate reabsorption?

  • Aldosterone
  • Renin
  • Parathyroid hormone (correct)
  • Natriuretic hormone

Which hormone promotes vasodilation in the nephron?

  • Renin
  • Aldosterone
  • Natriuretic hormone (correct)
  • ADH

What controls the movement of sodium in the body indirectly?

  • ADH (correct)
  • Natriuretic hormone
  • Renin
  • Parathyroid hormone

Which electrolyte typically moves opposite of sodium most of the time?

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

What is responsible for regulating calcium levels in the body?

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

What is the primary reason for the darker urine and slight scent of ammonia in cases of dehydration?

<p>Elevated specific gravity due to minimal urine output (D)</p> Signup and view all the answers

What is a potential consequence of oliguria where a person excretes only 300-500 mL of urine per day?

<p>Possible dehydration or blood loss (A)</p> Signup and view all the answers

What is the main function of the urethra in the excretory system?

<p>Transport urine from the bladder to outside the body (A)</p> Signup and view all the answers

Which structure in the kidney is primarily responsible for filtering blood and forming urine?

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

What process occurs at the glomerulus that aids in filtering solutes into Bowman's capsule?

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

What role does the macula densa play in kidney function?

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

Which hormone plays a key role in increasing sodium reabsorption in the distal convoluted tubule?

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

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