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Figure 7 shows the human urinary system - Edexcel - GCSE Biology - Question 4 - 2021 - Paper 1

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Figure 7 shows the human urinary system. (a) Urine is made by removing water, urea and salts from the blood. Use the letter X to label where urine is made. (b) Whi... show full transcript

Worked Solution & Example Answer:Figure 7 shows the human urinary system - Edexcel - GCSE Biology - Question 4 - 2021 - Paper 1

Step 1

Use the letter X to label where urine is made.

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Answer

Urine is primarily produced in the kidneys, specifically in the nephrons, which filter the blood and remove waste products.

Step 2

Which substance is converted to urea in the liver?

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Answer

Amino acids are converted to urea in the liver through a process called deamination. During this process, the amino group is removed, resulting in the formation of ammonia, which is then converted to urea for excretion.

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