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The table below shows the mean levels of glucose and insulin in two groups of people sampled one hour after the ingestion of 75 g of glucose - VCE - SSCE Biology - Question 5 - 2003 - Paper 1
Question 5
The table below shows the mean levels of glucose and insulin in two groups of people sampled one hour after the ingestion of 75 g of glucose. One of the experimental... show full transcript
Worked Solution & Example Answer:The table below shows the mean levels of glucose and insulin in two groups of people sampled one hour after the ingestion of 75 g of glucose - VCE - SSCE Biology - Question 5 - 2003 - Paper 1
Step 1
What is the purpose of the control group?
Answer
The control group serves as a baseline comparison against which the experimental group can be measured. It allows researchers to determine the effects of the variable being tested, in this case, the impact of glucose ingestion on insulin and glucose levels in people with diabetes.
Step 2
Using the above data, give two reasons to explain which group (X or Y) included the people with diabetes.
Answer
Group X included the people with diabetes.
Reason 1: The plasma glucose levels at 60 minutes for group X are significantly higher (13.0 mmol/L) compared to group Y (7.8 mmol/L), indicating that group X struggled to effectively lower glucose levels after ingestion.
Reason 2: The plasma insulin levels for group X decreased only slightly (from 68 to 66 nmol/L), suggesting that their bodies were unable to produce adequate insulin in response to the glucose intake, unlike group Y, which showed much higher insulin levels (from 69 to 380 nmol/L).