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People with diabetes insipidus are unable to produce enough of the hormone ADH - Edexcel - GCSE Biology - Question 5 - 2015 - Paper 1
Question 5
People with diabetes insipidus are unable to produce enough of the hormone ADH. In a medical study, the ADH levels in the blood of eight people were measured. Four... show full transcript
Worked Solution & Example Answer:People with diabetes insipidus are unable to produce enough of the hormone ADH - Edexcel - GCSE Biology - Question 5 - 2015 - Paper 1
Step 1
Calculate the mean ADH level in the people without diabetes insipidus.
Answer
To calculate the mean ADH level for people without diabetes insipidus, we will sum their ADH levels and then divide by the number of individuals.
The individual ADH levels are:
- A: 5.2 µg per dm³
- B: 2.8 µg per dm³
- C: 4.9 µg per dm³
- D: 3.5 µg per dm³
The total ADH level is:
Now, divide this total by the number of individuals (4):
Step 2
Suggest why there is a wide range of ADH levels in the people without diabetes insipidus.
Answer
The variations in ADH levels among individuals without diabetes insipidus can be due to several factors:
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Physiological Differences: Each individual may have different physiological characteristics that affect hormone levels, including body mass, age, or overall health.
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Environmental Factors: External factors such as hydration status, stress, or diet could influence the levels of ADH in their blood.
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Genetic Variability: Genetic differences can lead to variability in hormone production and regulation.
Together, these factors can contribute to a wide range of ADH levels in individuals who are otherwise healthy.