our body Flashcards
Which test do we use to detect for the presence of protein?
Biuret test
The Biuret test changes color in the presence of protein.
When testing for fats, what change indicates a positive result?
A red layer forms at the top of the solution
This indicates the presence of fats.
When testing for protein, what colour change indicates a positive result?
Purple
A purple color indicates the presence of proteins in the Biuret test.
Which test do we use to detect for the presence of fats?
Emulsion test
The emulsion test is used for detecting fats.
What is digestion?
The process of breaking down food into smaller components
Digestion involves both mechanical and chemical processes.
Where does mechanical digestion mainly occur?
In the mouth and stomach
Mechanical digestion involves physical breakdown of food.
Where does digestion of protein take place?
In the stomach and small intestine
Protein digestion involves enzymes like pepsin and trypsin.
List the organs the food will travel through on its way through the digestive system.
- Mouth
- Esophagus
- Stomach
- Small intestine
- Large intestine
- Rectum
- Anus
This sequence outlines the path of food in the digestive system.
Which nutrient starts to be chemically digested in the mouth?
Carbohydrates
Salivary amylase begins the breakdown of carbohydrates.
Where does digestion of lipids take place?
In the small intestine
Lipids are emulsified by bile and digested by lipases.
Which organ produces carbohydrase, protease, and lipase?
Pancreas
These enzymes are essential for digesting carbohydrates, proteins, and fats.
What is the purpose of hydrochloric acid in the stomach?
To create an acidic environment for enzyme activity
Hydrochloric acid activates pepsin and kills bacteria.
What is the purpose of bile in the digestive system?
To emulsify fats
Bile increases the surface area for lipase action.
Where is bile produced?
In the liver
Bile is essential for fat digestion.
Where is bile stored?
In the gallbladder
Bile is released into the small intestine when needed.
The site of maximum absorption in the digestive system is…
The small intestine
The small intestine has villi to increase absorption efficiency.
During digestion, carbohydrate is broken down into
Glucose
Carbohydrates are ultimately converted into simple sugars.
During digestion, protein is broken down into
Amino acids
Proteins are hydrolyzed into their constituent amino acids.
During digestion, lipids are broken down into
Fatty acids and glycerol
Lipids are emulsified and then hydrolyzed.
Which enzyme digests protein?
Pepsin
Pepsin is activated in the stomach for protein digestion.
Which enzyme digests carbohydrates?
Amylase
Amylase breaks down starches into sugars.
Which enzyme digests fats?
Lipase
Lipase hydrolyzes triglycerides into fatty acids.
Why is fibre not digested in the body?
Humans lack the enzymes to break it down
Fibre passes through the digestive system largely intact.
Why are vitamins and minerals not digested in the body?
They are absorbed as is
Vitamins and minerals do not require digestion.
