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Net diffusion always goes against the concentration gradient.
Net diffusion always goes against the concentration gradient.
False
What is diffusion?
What is diffusion?
Random scattering or spreading of substances in all directions until equilibrium is reached.
What is osmosis?
What is osmosis?
The diffusion of water through a semi-permeable membrane.
Osmotic pressure increases as the volume of water increases on one side of the membrane. This is related to ______ solutions.
Osmotic pressure increases as the volume of water increases on one side of the membrane. This is related to ______ solutions.
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What substances diffuse during filtration?
What substances diffuse during filtration?
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What is facilitated diffusion?
What is facilitated diffusion?
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Study Notes
Diffusion
- Involves random scattering of substances until equilibrium is achieved.
- Can occur across both living and non-living membranes.
- Net movement of particles is down the concentration gradient, despite individual particle movement in both directions.
Osmosis
- Defined as the diffusion of water through a semi-permeable membrane.
- Requires maintenance of the concentration gradient for substances across the membrane.
- Water moves down its concentration gradient until equilibrium is attained.
- As water volume increases on one side, osmotic pressure rises.
- Associated with three solution types: isotonic (equal concentration), hypertonic (higher concentration outside), and hypotonic (lower concentration outside).
Filtration
- A specialized form of diffusion focusing solely on crystalloids, such as salts and sugars.
- Crystalloids diffuse down their concentration gradient through a barrier.
Dialysis
- A specific diffusion process where only crystalloids move down the concentration gradient.
- Often applied in medical treatments to remove waste from blood.
Facilitated Diffusion
- Involves assistance from living membranes to help specific substances pass through.
- Utilizes proteins to aid in the transport of molecules across the membrane.
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Description
Explore the fascinating processes of diffusion, osmosis, filtration, and dialysis in this quiz. Understand how substances move across membranes and the factors that influence these processes. Test your knowledge on equilibrium, concentration gradients, and solution types.
