| Give 3 ways red blood cells are adapted to carry out their function? | 1)Shaped as biconcave disc - large surface area
2)Contain red pigment - haemoglobin, binds with oxgen - oxyhaemoglobin
3)Have no nucleus |
| Give 2 ways white blood cells are adapted? | 1)Engulf microorganisms - phagacytosis
2)Produce antibodies to fight microorganisms and antitoxins to neutralise their toxins |
| Give 2 ways platelets are adapted? | 1)Small fragments of cells, have no nucleus
2)Help blood clot a wound preventing microorganisms getting in |
| Give 7 things plasma contain? | 1)Red and white blood cells and platelets
2)Nutrients - glucose and amino acids
3)Carbon dioxide
4)Urea
5)Hormones
6)Protiens
7)Antibodies and antitoxins produced by white blood cells |
| How can I test for reducing sugars? | 1)Place 5cm^3 food sample in test tube in 75c waterbath
2)Add 10 drops benidict soloution and leave 5 mins pointing away from you
3)Ascending sugar
- Blue
- Green
- Orange
- Brick Red |
| How can i test for starch? | 1)Place 5cm^3 in test tube
2)Add a few drops of iodine soloutuion gently shake
3)Brown/Orange (remains if no starch) to Blue black |
| How can i test for protiens? | 1)Place 2cm^3 in test tube
2)Add 2cm^3 biurett solution - gently shake
3)Blue (remains if no protien) to purple |
| How can I test for lipids? | 1)Prepare 5cm (dont need to filter) test tube
2)Add 3 drops sudan III stain soloution gently shake
3)Red seperate layer will form. |
