The diagram shows a simplified model of a mammalian nephron and three processes labelled 1, 2 and 3 - HSC - SSCE Biology - Question 7 - 2016 - Paper 1
Question 7
The diagram shows a simplified model of a mammalian nephron and three processes labelled 1, 2 and 3.
Which row of the table correctly identifies each of the process... show full transcript
Worked Solution & Example Answer:The diagram shows a simplified model of a mammalian nephron and three processes labelled 1, 2 and 3 - HSC - SSCE Biology - Question 7 - 2016 - Paper 1
Step 1
1. Identify Process 1: Filtration
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Answer
Process 1, which occurs in the glomerulus of the nephron, is filtration. In this stage, blood plasma is filtered out of the capillaries into the Bowman's capsule, allowing smaller molecules and fluid to pass through while retaining larger molecules.
Step 2
2. Identify Process 2: Reabsorption
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Answer
Process 2 occurs primarily in the proximal convoluted tubule. During reabsorption, essential substances such as glucose, ions, and water are reabsorbed back into the bloodstream, ensuring that necessary components are not lost.
Step 3
3. Identify Process 3: Secretion
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Process 3 is secretion, which typically happens in the distal convoluted tubule. In this phase, additional waste products and excess ions are transferred from the bloodstream into the tubular fluid, leading to their eventual excretion.
