Transport Summary & Applications (OCR GCSE Biology A (Gateway Science Suite)): Flashcards
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Three primary transport mechanisms in cells
Three primary transport mechanisms in cells
Diffusion, osmosis, and active transport
Definition of diffusion
Definition of diffusion
Movement of particles from higher to lower concentration until equilibrium
Is diffusion passive or active?
Is diffusion passive or active?
Passive (no energy required)
Definition of osmosis
Definition of osmosis
Diffusion of water molecules across a partially permeable membrane
Is osmosis passive or active?
Is osmosis passive or active?
Passive (no energy required)
Definition of active transport
Definition of active transport
Movement of particles from low to high concentration using energy
Energy source for active transport
Energy source for active transport
Energy from respiration
Example of diffusion in lungs
Example of diffusion in lungs
Oxygen from alveoli into blood
Example of osmosis in plants
Example of osmosis in plants
Water moving into plant roots from soil
Example of active transport in plants
Example of active transport in plants
Mineral ions absorbed into root hair cells from soil
Minerals absorbed by active transport in roots
Minerals absorbed by active transport in roots
Potassium and nitrate
Active transport in small intestine absorbs
Active transport in small intestine absorbs
Glucose and amino acids
Role of osmosis in kidneys
Role of osmosis in kidneys
Reabsorption of water and forming concentrated urine