Transport Summary & Applications (OCR GCSE Biology A, Combined (Gateway Science Suite)): Flashcards
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Three primary transport mechanisms
Three primary transport mechanisms
Diffusion, osmosis, active transport
Diffusion definition
Diffusion definition
Movement of particles from higher to lower concentration until equilibrium
Is diffusion passive or active?
Is diffusion passive or active?
Passive (no energy required)
Osmosis definition
Osmosis definition
Water diffusion across partially permeable membrane from higher to lower water concentration
Is osmosis passive or active?
Is osmosis passive or active?
Passive (no energy required)
Active transport definition
Active transport definition
Movement against concentration gradient using energy
Energy source for active transport
Energy source for active transport
Energy from respiration
Gas exchange in alveoli uses which process?
Gas exchange in alveoli uses which process?
Diffusion of oxygen and carbon dioxide
Active transport in plant roots absorbs
Active transport in plant roots absorbs
Mineral ions like 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 to form concentrated urine
Gas for photosynthesis enters leaf cells by
Gas for photosynthesis enters leaf cells by
Diffusion of carbon dioxide
Which transport processes are passive?
Which transport processes are passive?
Diffusion and osmosis
Which transport process requires energy?
Which transport process requires energy?
Active transport
Transport mechanisms help maintain
Transport mechanisms help maintain
Homeostasis (stable internal environment)