A2 Biology Homeostasis and Osmoregulation Revision

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1. Which of the following is true in a functional nephron?

  • Ψp(glomerulus) + Ψs(blood) > Ψp(capsule) + Ψs(filtrate)
  • Ψp(glomerulus) + Ψs(blood) < Ψp(capsule) + Ψs(filtrate)
  • Ψp(glomerulus) + Ψs(blood) = Ψp(capsule) + Ψs(filtrate)
  • Ψp(glomerulus) + Ψs(blood) > Ψs(capsule) + Ψp(filtrate)
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2. Which is of the following is NOT a feature of the proximal convoluted tubule?

  • Lots of mitochondria
  • Spaces
  • Microvilli and infolding
  • Carrier molecules

3. Where is ADH stored?

  • Distal convoluted tubule
  • Hypothalamus
  • Posterior lobe of pituitary body
  • Nephrons

4. In which tube does selective reabsorption primarily occur?

  • Proximal convoluted tubule
  • Loop of Henlé
  • Proximal convoulted tube
  • Distal convoluted tubule

5. Which of the following is NOT true about the Loop of Henlé?

  • Descending limb secretes sodium and chloride ions into the interstitial space
  • Ascending limb is thick and impermeable
  • Made up of cuboidal epithelial cells
  • Spans across the cortex and medulla boundary
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