Question

An oral glucose tolerance test in a patient with 

A. Diabetes mellitus shows a higher than normal fasting blood glucose level. 

B. Diabetes mellitus shows glycosuria when blood glucose is three times the normal fasting level. 

C. Diabetes mellitus shows a delayed return to the fasting blood glucose level. 

D. An insulin-secreting tumour shows no rise in blood glucose level during the test. 

E. Malabsorption syndrome shows a lower than normal peak level for blood glucose.

Answer 1

A. True The level is higher due to impaired glucose homeostasis even in the fasting state.

B. True The renal threshold for glucose is about twice the normal fasting level. 

C. True Due to impaired insulin response to the glucose stimulus. 

D. False Blood glucose rises but then falls to a low level due to excessive insulin secretion. 

E. True The curve is flattened due to impaired glucose absorption.