Organisation Flashcards
put the following structures in order of their size from smallest to largest
organ, cell, tissue, organism, organ system
cell, tissue, organ, organ system, organism
name the four key systems
respiratory system, circulatory system, digestive system, nervous system
What breaks down Carbohydrates (Starch) and into what?
Corbohydrase/ amylase, into sugars/glucose
What breaks down proteins and into what?
Protease into amino acids
What breaks down lipids and into what?
Lipase into fatty acids and glycerol
Which enzyme can work in acidic conditions?
Protease
Where is lipase found/produced?
Pancreas and Small intestines
Where is protease found/produced?
Stomach, pancreas and small intestines.
Where is amylase found/produced?
Mouth (salivary glands), pancreas, small intestines.
What is the role of bile?
It emulsifies fats (for a larger surface area) and neutralises stomach acid.
What are the adaptations of villi?
They have microvilli to increase surface area, good blood supply to maintain steep concentration gradient, and walls that are one cell thick to keep a short diffusion distance.
How do you test for starch? (Include the positive test result)
Iodine solution will turn starch blue/black
How do you test for Sugar? (Include the positive test result)
Bendedict’s solution and put into a water bath. It will turn Green/Yellow/Orange/Red
How do you test for Protein? (Include the positive test result)
Buiret’s reagent. Pink/Purple
How do you test for specific food molecules? (Starch, Sugar, Protein)
—Break it up, mix with water, then filter out the remaining solids.
—Add 10 drops of the test solution that applies to 5cm^3 of your solution
— Wait for colour change
— If testing for sugar, use a water bath to heat
— For buiret’s, add 2cm^3 of Protein solution and the same amount of Buiret’s. Mix and wait for colour change
