quiz 3 Flashcards
what is the component of blood called that carries all of the blood cells in it?
plasma
what is bile?
a substance that emulsifies fats
Name the blood vessel by which blood arrives back to the heart from the rest of the body
vena cava
What gas diffuses into the bloodstream from the lungs?
oxygen
What are the small gas exchange structures in the lungs called?
alveoli
Name the structure which carries air from the nose and mouth to the lungs
trachea
Name the blood vessel by which blood leaves the lungs to go back to the heart
pulmonary vein
what is the test for fats or lipids in food?
Add ethanol or Sudan 111 to the solution and shake. An upper layer of cloudy white will form(or red if you used Sudan 111)
what major organelle do red blood cells lack?
Nucleus
why is the active site of an enzyme complementary?
it fits the shape of the substrate perfectly
what is the test for protein in food?
Add biuret reagent to the sample/solution. it should turn from blue to orange/red
How do stents treat coronary heart disease?
re-opens the blocked coronary artery,restoring blood flow
Name 2 key adaptations of capillaries
very thin walls,very narrow
what is the test for starch in food?
add iodine solution to a sample or a solution of the food. iodine turns from orange to blue/black
What is the test for glucose(sugar) in food?
Add benedicts reagent to a sample or solution of the food, heat to 75 degrees Celsius. reagent turns from blue to orange/red
