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5 Cards in this Set

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What is 'alactasia'?
Inability to metabolise lactose, because of a lack of the required enzyme lactase in the digestive system
Inability to metabolise lactose, because of a lack of the required enzyme lactase in the digestive system
Alactasia/lactose intolerance
What are the two methods for measuring urine/plasma glucose


HINT: One is enzymatic and the other is not
1. Reduction of alkaline copper reagent (will detect any reducing compound present)

2. Reaction with glucose oxidase (specific for glucose)
--> The enzyme produces hydrogen peroxide, which oxidises a colourless dyestuff to give a blue colour
What is 'pentosuria'?


HINT: Look at the break down of the word
Excretion of 5-carbon sugars in the urine, most of these are reducing sugars

IMPORTANT as test for diabetes requires oxidation of a colourless dyestuff. However, if VitC/reducing substances are present, the glucose oxidase test will not be positive
If you see a question in a paper talking about a patient who presents with a history of abdominal discomfort and diarrhoea, you should suspect...
Lactose intolerance/alactasia (due to increasing age)