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Karnataka PUC I Excretory Products and their Elimination — practice questions — page 2

Explore 50 free Excretory Products and their Elimination questions in Karnataka PUC I Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Excretory Products and their Elimination questions and exercises with answers

Showing questions 31–50 of 50.

A patient with end-stage renal failure typically requiresRead the answer and worked solution →Birds, reptiles, and insects are classified as URICOTELIC because they primarily excrete:Read the answer and worked solution →The functional unit of the human kidney is called the:Read the answer and worked solution →Most of the GLUCOSE in the glomerular filtrate is reabsorbed in the:Read the answer and worked solution →ADH (anti-diuretic hormone, vasopressin) acts to:Read the answer and worked solution →CO2 in the human body is primarily excreted by the:Read the answer and worked solution →The condition of having high urea levels in the blood (a sign of kidney failure) is called:Read the answer and worked solution →Work out the kidney numbersRead the answer and worked solution →Match the kidney structureRead the answer and worked solution →Into the kidney or out of it?Read the answer and worked solution →Follow the filtrateRead the answer and worked solution →Judge the filtration claimsRead the answer and worked solution →Follow the filtrate down to urineRead the answer and worked solution →Trace filtrate through a nephronRead the answer and worked solution →Catch only the nephron partsRead the answer and worked solution →Split the two limbs of HenleRead the answer and worked solution →Spot the lie on kidney controlRead the answer and worked solution →Group each organ with its animalRead the answer and worked solution →Which waste does it excrete?Read the answer and worked solution →Which one does NOT belong?Read the answer and worked solution →

Worked practice questions

A patient with end-stage renal failure typically requires

  1. regular blood transfusions
  2. dialysis or kidney transplant
  3. removal of one kidney
  4. respiratory therapy
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Correct answer: B. dialysis or kidney transplant

Dialysis (artificial filtering) or kidney transplant. Without filtering, urea, creatinine and fluid build up to toxic levels.

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Birds, reptiles, and insects are classified as URICOTELIC because they primarily excrete:

  1. Ammonia (highly toxic, common in fish)
  2. Uric acid (low toxicity, very little water)
  3. Urea (moderately toxic, common in mammals)
  4. Creatinine (a muscle breakdown product)
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Correct answer: B. Uric acid (low toxicity, very little water)

Uricotelic animals excrete URIC ACID (insoluble paste, low toxicity, requires minimal water). Suits flying birds + desert-dwelling reptiles. Aquatic = ammonotelic; mammals = ureotelic.

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The functional unit of the human kidney is called the:

  1. Glomerulus (just the capillary tuft)
  2. Bowman's capsule (just the cup)
  3. Nephron (whole filtering unit)
  4. Loop of Henle (just one segment)
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Correct answer: C. Nephron (whole filtering unit)

NEPHRON is the functional unit of the kidney. Each kidney has ~1 million nephrons. **Components:** Bowman's capsule (with glomerulus), PCT, Loop of Henle, DCT, collecting duct. ~1 million per kidney.

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