Human Biological Processes Flashcards
What are the three main types of food?
- Proteins (made up of amino acids)
- Lipids (fats and oils)
- Carbohydrates
What are enzymes?
Enzymes are proteins that act as biological cataclysts
What are short chains of amino acids called?
Peptides
What does vitamin K do?
Is needed in the blood clotting process
What is roughage?
The indigestible parts of the the plants that you eat
Why do we need roughage?
To adds bulk to food and helps with food being digested
What happens when you have a lack of iron?
You can get anaemia and become pale
How do you test for starch?
Put starch in a test tube and add 1ml of water then add a few drops of iodine.
How do you test for glucose?
Place a small amount of glucose in a test tube and add 1ml of water then add a few drops of Benedicts solution. Heat the test tube and wait for a colour change.
How do you test for protein?
Put a small amount of protein in a test tube then add 1ml of 15% sodium hydroxide solution. Then add a few drops of 1% copper sulfate.
How do you test for lipids?
Put 1ml of alcohol in a test tube. Add the lipid and then add 1ml of water and look for a colour change.
What is digestion?
Digestion is the breaking down of large molecules into smaller, more digestible molecules.
What type of food is broken down in the mouth?
Starch
What does saliva contain?
Amylase
What occurs in the esophagus?
Peristalsis
