Membrane Transport

Front

What is membrane transport?

Back

Membrane transport refers to the movement of substances across a cell membrane, which can occur through passive or active mechanisms.

Front

What are the two main types of membrane transport?

Back

Passive transport and active transport.

Front

Define passive transport.

Back

Passive transport is the movement of substances across a cell membrane without the use of energy, relying on concentration gradients.

Front

What is active transport?

Back

Active transport is the movement of substances against their concentration gradient, requiring energy (usually in the form of ATP).

Front

What are channel proteins?

Back

Channel proteins are integral membrane proteins that form pores in the membrane, allowing specific molecules to pass through.

Front

What are carrier proteins?

Back

Carrier proteins are transport proteins that change shape to move substances across the membrane.

Front

What is turgor pressure?

Back

Turgor pressure is the pressure exerted by the fluid inside the central vacuole of a plant cell against the cell wall, helping maintain cell structure.

Front

What happens to a red blood cell in a hypertonic solution?

Back

In a hypertonic solution, a red blood cell will shrink due to water moving out of the cell.

Front

What is exocytosis?

Back

Exocytosis is the process by which cells transport large molecules out of the cell by vesicles that fuse with the plasma membrane.

Front

What is endocytosis?

Back

Endocytosis is the process by which cells engulf substances from the outside environment, bringing them into the cell.