18 Questions
What is the function of villi in the ileum?
To maximize absorption of digested soluble molecules into the blood
Which enzyme breaks down starch into maltose?
Amylase
What is the role of lipases in the digestive system?
Breaking down lipids into glycerol and fatty acids
How can the energy content in a food sample be measured?
By using calorimetry
Where does water absorption primarily occur in the digestive system?
In the large intestine
What is the function of proteases in the digestive system?
Breaking down proteins into amino acids
What elements make up proteins?
Carbon, oxygen, hydrogen, sulfur, nitrogen, phosphorous
Which monomers do proteins break down into?
Amino acids
What are lipids (fats and oils) made of?
Carbon, oxygen, hydrogen
What are the components of a lipid molecule that is broken down during digestion?
3 fatty acids and 1 glycerol molecule
How is the presence of glucose tested for in a food sample?
By adding Benedict's solution and heating at 60-70°C
What do enzymes act as in biological systems?
Substances that increase the rate of reactions without being used up
What is the function of amylase in the digestive system?
Break down starch into glucose
Where is bile produced in the human body?
Liver
Which enzyme is responsible for breaking down proteins in the stomach?
Pepsin
What is the role of hydrochloric acid in the stomach?
Make the stomach acidic for enzyme activity and bacteria killing
Which organ produces carbohydrase, protease, and lipase enzymes?
Pancreas
What is the first part of the small intestine called?
Duodenum
Test your knowledge on macromolecules like proteins and lipids, and practical skills in investigating food samples for glucose, starch, protein, and fat. Learn about the composition of proteins and lipids, as well as the process of testing for glucose in food samples.
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