Passive Transport
Movement from high to low concentration without energy.
What is diffusion?
Movement against the concentration gradient using energy.
What is active transport?
The difference in concentration between two areas.
What is a concentration gradient?
The energy molecule used by cells.
What is ATP?
Oxygen moving from lungs into bloodstream.
What is diffusion?
The movement of water across a membrane.
What is osmosis?
The cell process of taking materials into the cell using a vesicle.
What is endocytosis?
In diffusion, molecules move from ______ concentration to ______ concentration.
What is High to low?
Facilitated diffusion does not require this.
What is ATP (energy)?
Water leaving a plant cell in salty water.
What is osmosis?
This type of passive transport uses a protein channel.
What is facilitated diffusion?
The process of releasing materials out of the cell using a vesicle.
What is exocytosis?
In active transport, molecules move from ______ concentration to ______ concentration.
What is Low to high?
Which types of transport use ATP?
Active transport, endocytosis, exocytosis.
A white blood cell engulfing bacteria.
What is endocytosis?
Passive transport does not require this.
What is energy?
This pump moves sodium and potassium in opposite directions using ATP.
What is the sodium-potassium pump?
What happens to diffusion when equilibrium is reached?
Molecules continue moving, but there is no net movement.
Why can large particles not move by diffusion?
They are too large and require vesicles/energy.
Glucose entering a cell through a protein channel.
What is facilitated diffusion?
Why is passive transport important for cells?
It allows materials like oxygen and nutrients to enter cells without using energy.
Why does active transport require energy?
Because molecules are moved from low to high concentration (against the gradient).
Why is equilibrium important for homeostasis?
It keeps the internal environment stable.
Give one example of a body system that relies on active transport.
Nervous system (ion pumps), kidneys, intestines.
Calcium ions pumped into a cell using ATP.
What is active transport?