8 Flashcards
(14 cards)
What is Active Transport?
Movement of molecules across a membrane using energy
Involves molecular pumps and vesicles.
What do Molecular Pumps do?
Pump molecules across the membrane
They help concentrate key molecules or remove waste.
What is the role of energy (E) in Active Transport?
To move molecules against the concentration gradient
This occurs through protein channels.
Give an example of ions transported by Active Transport.
- Potassium (K*)
- Chlorine (Cl)
- Sodium (Na)
These are charged particles.
What is Endocytosis?
Uses vesicles to move large particles into the cell
Important for immune response.
What is Phagocytosis?
Cell ‘eating’ - engulfs large particles into vesicles
Example: White blood cells engulfing bacteria.
What is Pinocytosis?
Cell ‘drinking’ - engulfs fluids into vesicles
Allows cells to intake nutrients.
What is Exocytosis?
Uses vesicles to export materials out of the cell
Example: Nerve cells secreting neurotransmitters.
What is Facilitated Diffusion?
Passive transport using protein channels
Does not require energy.
What type of transport is Osmosis?
Passive transport of water
Involves movement through semipermeable membranes.
Fill in the blank: Active Transport is _______.
[Requires energy]
Essential for moving substances against their gradient.
Fill in the blank: Passive Transport includes _______.
[Facilitated diffusion, Osmosis, Simple diffusion]
These processes do not require energy.
What are examples of substances transported by Facilitated Diffusion?
- Glucose
- Oxygen (O2)
- Carbon Dioxide (CO2)
Important for cellular respiration.
How does Active Transport help maintain homeostasis?
- Regulating blood sugar
- Controlling blood pressure
- Muscle contractions and nerve signal conduction
These processes ensure stable internal conditions.
