B3 Flashcards
What is a tissue?
A tissue is a group of cells with similar structure and function working together.
What is an organ?
An organ is a collection of tissues. Each organ consists of several tissues working together to perform a specific function.
What is an organ system?
An organ system is a group of organs that are working together to perform a specific function.
Pancreas
An organ where small digested molecules are absrbed into the blood stream.
Stomach
An organ where food is churned with digestive juices and acids.
Small intestine
An organ that makes and releases digestive juices containing enzymes to break down your food
Large intestine
An organ where water passes back into the body,
leaving solid waste
Sources of carbohydrates.
Bread
Pasta
Chocolate
Potato
Sources of lipids.
Oil
Butter
Margarine
Sources of protein.
Meat
Poultry
Eggs
What are Enzymes?
Enzymes are biological catalysts which help the chemical reactions, but are not used up.
Factors affecting enzyme action
Temperature
PH
How does temperature affect enzyme action
The higher the temperature the quicker the enzyme action is, up to a point (40 degrease celsius).
How does PH affect enzyme action
As the PH increases the quicker the enzyme action is, up to a point, as enzymes will stop working after PH 7
