Cell Membrane and Transport Flashcard Review

Front

What is Active Transport?

Back

Active Transport is the movement of solutes against the concentration gradient, requiring energy (ATP) to move substances from an area of lower concentration to an area of higher concentration.

Front

What is the Fluid Mosaic Model?

Back

The Fluid Mosaic Model describes the plasma membrane as a mosaic of components (lipids, proteins, carbohydrates) that move freely and fluidly, allowing for flexibility and functionality.

Front

What is Facilitated Diffusion?

Back

Facilitated Diffusion is a type of passive transport that requires the use of transport proteins to help move substances across the cell membrane without the use of energy.

Front

What are the three main components of the cell membrane?

Back

The three main components of the cell membrane are lipids, proteins, and carbohydrates.

Front

What happens to a cell in a hypertonic solution?

Back

In a hypertonic solution, water moves from the inside of the cell to the outside solution, causing the cell to shrink.

Front

What is Passive Transport?

Back

Passive Transport is the movement of substances across the cell membrane without the use of energy, typically moving from an area of higher concentration to an area of lower concentration.

Front

Define Osmosis.

Back

Osmosis is the diffusion of water across a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration.

Front

What is a selectively permeable membrane?

Back

A selectively permeable membrane is a barrier that allows certain substances to pass through while blocking others, maintaining the internal environment of the cell.

Front

What is the role of transport proteins?

Back

Transport proteins facilitate the movement of substances across the cell membrane, either by providing a passageway for molecules or by actively transporting them.

Front

What is a hypotonic solution?

Back

A hypotonic solution has a lower concentration of solutes compared to the inside of the cell, causing water to move into the cell, potentially leading to swelling or bursting.