Excretion as an example of homeostatic control

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Question 6
Medium

The diagram below shows the structure of a single mammalian nephron.

A diagram of a single mammalian nephron. Bowman's capsule and glomerulus are labeled W. The proximal convoluted tubule is labeled X. The distal convoluted tubule is labeled Y. The collecting duct is labeled Z. A vertical arrow on the left points downwards, indicating increasing interstitial solute concentration from the cortex to the medulla.

a.

Complete the table below by matching the correct letter (WWW, XXX, YYY, or ZZZ) of the nephron to each physiological statement.

StatementLetter
Selective reabsorption of all filtered glucose and amino acids occurs at this site.
The cells here contain receptor proteins for antidiuretic hormone (ADH) to regulate water reabsorption.
High hydrostatic pressure forces water and small solutes across membranes into the tubule lumen here.
[3]
b.

Describe how the activity of the ascending limb and the properties of the descending limb of the loop of Henle work together to create the concentration gradient in the medulla tissue fluid.

[3]

Excretion as an example of homeostatic control Questions

  1. A Level
  2. /Biology
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