Acrive Transport Osmosis And difusion Flashcards
What’s active transport
Movement of particles from low concentration to high concentration.
Energy needed.
Example: Plants absorbing minerals from the soil.
What’s diffusion
Diffusion is when particles move form high to low concentration
.
No energy needed.
Example: Oxygen moving into your cells.
happens in gas
What osmosis
Movement of water from low concentration to high concentration through a membrane.
No energy needed.
Example: Water moving into a plant’s roots.
What factors make diffusion faster?
Bigger concentration gradient – A larger difference between high and low concentration speeds up diffusion.Larger surface area
Temperature: Hotter = faster movement of particle
Surface Area: Bigger = faster movement of particle
Do osmosis require energy
No energy is required in osmosis( passive process)
Example of osmoosis
●Water moving into plant root cells
●Water leaving animal cells in salty solution
What factors make osmosis faster?
Bigger water concentration gradient – A larger difference in water concentration across a membrane speeds up osmosis.
Higher temperature
Temperature:
Hotter = faster movement of particles.
Larger surface area More membrane space means more water can move across at once.
Thinner membrane (shorter distance)
A thinner barrier means water travels across faster.
What factors make active transport faster?
Higher concentration of ATP – Active transport needs energy from ATP, so more ATP means it can happen faster.
Steeper concentration gradient
Higher temperature
Cells in good condition with working mitochondria can produce more energy for transport.
Indipendent variable
What you change (e.g., concentration of salt solution).
Dependent Variable
What you measure or observe (e.g., change in mass of the potato).
Control Variables
What you keep the same (e.g., size of the potato slices, volume of solution, temperature).
