3C - Active Transport

What is active transport?

The movement of molecules against their concentration gradient, requiring energy.

What are the two subtypes of active transport?

Protein-mediated active transport and bulk transport.

What is protein-mediated active transport?

Transport of molecules against their concentration gradient via protein pumps.

What is bulk transport?

The movement of large materials into or out of the cell using vesicles.

What is the primary energy source for active transport?

ATP (Adenosine Triphosphate).

What happens to ATP during protein-mediated active transport?

ATP is broken down into ADP and phosphate, releasing energy.

What is exocytosis?

The process of moving bulky materials out of the cell using vesicles.

What is endocytosis?

The process of taking bulky materials into the cell.

What are the steps of exocytosis?

1. Vesicular transport 2. Fusion 3. Release.

What are the steps of endocytosis?

1. Fold 2. Trap 3. Bud.

What is pinocytosis?

Endocytosis of fluids into the cell.

What is phagocytosis?

Endocytosis of solids into the cell.

What is the key difference between protein-mediated active transport and bulk transport?

Protein-mediated active transport uses protein pumps, while bulk transport involves vesicles.

What type of transport requires energy?

Active transport.

What type of transport does not require energy?

Passive transport.

What is facilitated diffusion?

The process of moving molecules down their concentration gradient through protein channels.

What is osmosis?

The movement of water across a semipermeable membrane.

What is diffusion?

The movement of molecules from an area of high concentration to an area of low concentration.