B3: Organisation And Digestion Flashcards
What is a tissue?
A group of cells of the same type
What is an organ?
A group of tissues that work together to peform a function
Put these in order of smallest to largest
Organ, tissue, organelle, organism, cell, organ system
Smallest - Organelle, cell, Tissue, Organ, Organ system, Organism - Largest
What are the names of some organ systems?
Circulatory system
Digestive system
Nervous system
Reproductive system
What is the stomachs function?
To churn food with hydrochloric acid added
What is the function of the large intestine?
It is where water is re-absorbed into the body
What are the 7 nutrient groups?
Carbohydrates, Protiens, Lipids, Minerals, Vitamins, Fibre, Water
What are enzymes used as?
Biological Catalysts
Are enzymes used up in reactions?
They speed up the reaction but are not used up
What is related to the way enzymes work?
A lock and a key
Why are enzymes related to lock and keys?
Because the enzyme and the substrate fit perfectly together like a lock and a key
What are the 2 types of digestion?
Mechanical and Chemical
What is mechanical digestion carried out by?
The teeth
What is chemical digestion carried out by?
Enzymes
What are the 2 parts needed to fit together for an enzyme to work?
Enzyme and substrate
