Transport in Cells (AQA GCSE Biology): Flashcards
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3 primary transport mechanisms
3 primary transport mechanisms
Diffusion, osmosis, active transport
Diffusion definition
Diffusion definition
Movement of particles from higher to lower conc. until equilibrium
Type of process: diffusion
Type of process: diffusion
Passive (no energy required)
Osmosis definition
Osmosis definition
Water movement across partially permeable membrane from higher to lower water conc.
Type of process: osmosis
Type of process: osmosis
Passive (no energy required)
Active transport definition
Active transport definition
Movement of particles from low to high conc. against gradient using energy
Energy requirement of active transport
Energy requirement of active transport
Energy from respiration required
Example: diffusion in lungs
Example: diffusion in lungs
O2 from alveoli into blood
Example: osmosis in plants
Example: osmosis in plants
Water moving into plant roots from soil
Example: active transport in plants
Example: active transport in plants
Mineral ions absorbed into root hair cells
Mineral ions absorbed by active transport in plants
Mineral ions absorbed by active transport in plants
Potassium and nitrate
Process for glucose absorption in small intestine
Process for glucose absorption in small intestine
Active transport
Role of osmosis in kidneys
Role of osmosis in kidneys
Reabsorption of water
How CO2 enters leaf cells for photosynthesis
How CO2 enters leaf cells for photosynthesis
Diffusion
Which transport processes are passive?
Which transport processes are passive?
Diffusion and osmosis