A drop of fluid enters the Bowman's capsule of a nephron…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
A drop of fluid enters the Bowman's capsule of a nephron.
- Write the parts that it passes through, in order, until it enters the renal pelvis.
- Which of these parts lie in the cortex?
- Which part lies in the medulla?
Need a reminder? The key ideaShow
A nephron is a glomerulus and a renal tubule. The tubule runs from the Bowman's capsule through the proximal convoluted tubule, the loop of Henle (descending then ascending limb) and the distal convoluted tubule to the collecting duct. The corpuscle, the PCT and the DCT lie in the cortex, the loop in the medulla. The efferent arteriole forms the peritubular capillaries and the vasa recta. Cortical nephrons have short loops. Juxtamedullary nephrons have long loops.
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Step 1. (a) Bowman's capsule, proximal convoluted tubule, descending limb of the loop of Henle, ascending limb of the loop of Henle, distal convoluted tubule, collecting duct. The collecting duct opens into the renal pelvis.
Step 2. (b) The capsule, the proximal tubule and the distal tubule lie in the cortex.
Step 3. (c) The loop of Henle lies in the medulla. The collecting duct runs through both zones.
Answer: capsule, PCT, descending limb, ascending limb, DCT, collecting duct; cortex: capsule, PCT, DCT; medulla: loop of Henle.
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