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This question is about homeostasis - AQA - GCSE Biology: Combined Science - Question 6 - 2019 - Paper 2
Question 6
This question is about homeostasis. 6.1 Define the term homeostasis. 6.2 Name the hormone released if the blood glucose concentration falls too low. Two people we... show full transcript
Worked Solution & Example Answer:This question is about homeostasis - AQA - GCSE Biology: Combined Science - Question 6 - 2019 - Paper 2
Step 1
Step 2
Step 3
Describe how Figure 4 shows that person B has diabetes.
Answer
Figure 4 illustrates that person B has diabetes by showing that their fasting blood glucose level is higher than the normal range, and their glucose concentration does not return to normal even after three hours post-drink. The blood glucose level exceeds the normal fasting range (3.5 - 5.5 mmol/dm³), indicating poor glucose regulation.
Step 4
Suggest which type of diabetes person A and person B have.
Answer
Person A Type of diabetes: Type 2 Reason: The pancreas produces a lot of insulin, but body cells cannot respond to it effectively.
Person B Type of diabetes: Type 1 Reason: The pancreas is not producing enough insulin to control the concentration of glucose in the blood.
Step 5
Explain why starving children who have eaten during the day are not affected by eating lychee fruits.
Answer
Starving children who have eaten during the day can utilize the glycogen stores in their liver to release glucose, preventing hypoglycemia. Since their bodies have been supplied with energy, they can compensate for the effects of lychee fruits. In contrast, children who have not eaten at all lack glycogen stores and cannot convert fat into glucose effectively, which can lead to dangerous drops in blood glucose levels.