Topic 2 - Organisation Flashcards
What does Carbohydrase break down and then what into?
-Carbohydrates
-Simple sugars
What does protease break down and then what into?
-Proteins
-Amino Acids
What does Lipase break down and then what into?
-Lipids/Fats
-Glycerol and 3 Fatty Acids
How does Food you eat travel through your body?
Mouth -> Oesophagus -> Stomach -> Small Intestine -> Large intestine -> Rectum
Function of Small & Large Intestine
Small - Food absorption
Large - Water absorption
What is the test for starch?
- Add few drops of Iodine to food Sample
-Gently Shake to mix
-Starch present = Colour change from orange to blue/black
What is the test for proteins?
- Add few drops of Biuret Solution to food sample
-Gently shake to mix
-Proteins Positive= Colour change from blue to purple/lilac
What is the test for sugars?
- Add few drops of Benedicts solution to prepared food sample
- GENTLY HEAT
- Sugars positive = Colour change from blue to Brick-Red
What is the test for Lipids?
- Add few drops of Sudan stain solution to food sample
- Shake the tube to mix
- Lipids preset = Distinct layer will form as the lipids seperate
Where does gas exchange happen and what happens?
- In the alveoli
- Oxygen is exchanged for carbon dioxide in the blood
What blood does the ‘left’ side pump? Where to?
- Oxygenated blood
- To the body
What blood does the ‘right’ side pump? Where to?
- Deoxygenated blood
- To the lungs
3 functions of the artery
- Thick muscular walls
- Carry blood AWAY from the heart
-Carry blood at high pressures due to a small lumen
3 functions of the veins
- Elastic walls, less muscular
- Carry blood back to the heart
- Contain valves to prevent back flow
3 functions of the capillaries
- Short diffusion pathway
- Efficient gas exchange
- Permeable walls
