B2 Flashcards
discuss the differences between a bengin and malignant tumour
a benign tumour is the growth of cells contained in one place, usually within a membrane. it isn’t cancerous and grows until there is no more room. it doesn’t invade other tissues and if it causes pressure or damage to an organ it can be dangerous.
malignant tumour is cancerous, the tumor grows and spreads to other tissues. the tumour may split up, resulting in cells being carried in the bloodstream or lymphatic system. they can travel to and stay in another organ, potentially causing secondary tumours. the cancer cells divide more rapidly and have a longer life span in comparison to normal cells.
what is cancer
uncontrolled growth and division of the cells
what does the Benedict’s test, test for
sugar
what is a positive result for the Benedict test
brick red colour
what does the Iodine’s test, test for
starch
what is a positive result for the Iodine test
blue-black colour
what does the Biuret’s test, test for
proteins
what is a positive result for the Biuret test
purple colour
what is a positive result for the Emulsion test
when ethanol is added, there is a cloudy layer if a lipid is present
what does the Emulsion test, test for
lipids
what does the Sudan III test for
lipids
what is a positive result for the Sudan III test
red layer forms on top
where is bile produced in
liver
where is bile stored in
gallbladder
what are the two roles of bile
- neutralise the HCL which comes from the stomach
- emulsifies large drops of fat into smaller ones