AP Bio Insta-Review Topic 2.9*: Mechanisms of Transport

Front

What is the role of carrier proteins in transport?

Back

Carrier proteins have an active site that binds to specific solutes, facilitating their transport across the cell membrane.

Front

What is active transport?

Back

Active transport requires input of energy (ATP) to move substances against their concentration gradient.

Front

What is endocytosis?

Back

Endocytosis is a process that requires ATP and allows large particles to enter the cell.

Front

What protein moves vesicles to the membrane for exocytosis?

Back

Dynein is the motor protein that moves vesicles to the membrane for exocytosis.

Front

What is facilitated diffusion?

Back

Facilitated diffusion uses transport proteins to help move substances across the cell membrane without using energy.

Front

Define passive transport.

Back

Passive transport is the movement of substances across a cell membrane without the use of energy, typically along the concentration gradient.

Front

What is the difference between active and passive transport?

Back

Active transport requires energy to move substances against their gradient, while passive transport does not require energy and moves substances along their gradient.

Front

What is the function of ATP in cellular transport?

Back

ATP provides the energy required for active transport processes.

Front

What is exocytosis?

Back

Exocytosis is the process by which cells expel large particles or substances by vesicles fusing with the plasma membrane.

Front

What is the concentration gradient?

Back

The concentration gradient is the difference in the concentration of a substance across a space, driving passive transport.