Diffusion (OCR GCSE Biology A (Gateway Science Suite)): Flashcards
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Definition of diffusion
Definition of diffusion
Particles move from higher to lower concentration until evenly spread
Type of transport diffusion is
Type of transport diffusion is
Passive transport (no energy required)
What is a concentration gradient
What is a concentration gradient
Difference in concentration across a space
Direction particles move in diffusion
Direction particles move in diffusion
Down the concentration gradient (high to low)
Examples of gases that diffuse
Examples of gases that diffuse
Oxygen and carbon dioxide
Small molecules in water that diffuse
Small molecules in water that diffuse
Glucose and amino acids
Ions that may diffuse through channels
Ions that may diffuse through channels
Sodium and potassium ions
Where oxygen diffuses from in lungs
Where oxygen diffuses from in lungs
Alveoli into the blood
Where CO2 diffuses to in lungs
Where CO2 diffuses to in lungs
From blood into alveoli to be exhaled
Where glucose diffuses in small intestine
Where glucose diffuses in small intestine
From gut into the blood
What diffusion helps maintain
What diffusion helps maintain
Homeostasis (stable internal conditions)
Waste product removed by diffusion
Waste product removed by diffusion
Carbon dioxide