Nephron and Urine Composition
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Questions and Answers

What is the function of the glomerulus in the nephron?

  • Producing urine
  • Reabsorbing water
  • Regulating urine pH
  • Filtering blood to create filtrate (correct)

What does the presence of leukocytes in urine indicate?

  • Dehydration
  • Excessive protein intake
  • Urinary tract infection (correct)
  • High glucose levels

What does the presence of ketones in urine suggest?

  • Low carbohydrate intake (correct)
  • Excessive protein intake
  • High glucose levels
  • Normal metabolic state

Which food group tends to lower urine pH?

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

What is the term used to describe the absence of urine production?

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

Which sphincter controls the release of urine from the bladder to outside the body?

<p>External urinary sphincter (D)</p> Signup and view all the answers

What is the medical term for urination?

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

Which organ receives about 25% of cardiac output while at rest?

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

What causes aquaporin channel proteins to work on the cell membrane and pull water back into the interstitial spaces for reabsorption?

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

What is the glomerular filtration rate a measure of?

<p>Rate of filtration per minute (A)</p> Signup and view all the answers

What is responsible for the reabsorption of most water before it reaches the collecting ducts?

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

What is responsible for recovering most of the solutes and water from the nephron and returning them back into circulation?

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

What happens when osmolarity is high in the body?

<p>Cells contract to form less urine (D)</p> Signup and view all the answers

Which structure in the kidney has a lot of mitochondria to produce enough ATP?

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

What will systemic edema result from?

<p>Low protein levels in the blood (D)</p> Signup and view all the answers

Which cells in the kidney respond to ATP and adenosine by either contracting or relaxing?

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

What is the primary role of the Loop of Henle in the nephron?

<p>Reabsorb water and some sodium (C)</p> Signup and view all the answers

Which hormone increases the number of sodium pumps in the DCT (Distal Convoluted Tubule)?

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

What is the main function of the ADH (Anti-diuretic hormone) in the kidneys?

<p>Increase water reabsorption (C)</p> Signup and view all the answers

Which mechanism involves smooth muscle contraction or relaxation based on blood pressure and flow rate to regulate urine production?

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

What is the impact of progesterone on kidney function?

<p>Promotes water retention (C)</p> Signup and view all the answers

Which hormone inhibits aldosterone, allowing sodium to leave and water to be excreted?

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

How do diuretics affect urine volume?

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

What is the primary role of endothelins in kidney function?

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

Which mechanism involves the adjustment of water and osmolarity balance in the collecting ducts?

<p>Renin-angiotensin-aldosterone system (A)</p> Signup and view all the answers

What happens to urine color when Anti-diuretic hormone (ADH) is actively working in our bodies?

<p>Urine is dark (B)</p> Signup and view all the answers

What is the role of calcitriol?

<p>Regulates calcium in the blood (C)</p> Signup and view all the answers

Which of the following best describes the function of erythropoietin (EPO)?

<p>Increases erythrocyte production (B)</p> Signup and view all the answers

Why is it suggested by some scientists that vitamin D should be referred to as a hormone and not a vitamin?

<p>It regulates calcium in the blood (D)</p> Signup and view all the answers

What is the main function of aldosterone in kidney regulation?

<p>Balances water and solutes in the blood stream (A)</p> Signup and view all the answers

How does EPO respond under conditions of low oxygen concentration?

<p>Increases red blood cell production (B)</p> Signup and view all the answers

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