Cell Membrane and Cell Transport Review

Front

What is the function of the cell membrane?

Back

The cell membrane controls the movement of substances in and out of the cell, maintaining homeostasis.

Front

Define facilitated diffusion.

Back

Facilitated diffusion is the process by which molecules pass through the cell membrane with the help of transport proteins, moving from high to low concentration.

Front

What is the difference between diffusion and osmosis?

Back

Diffusion is the movement of any molecules from high to low concentration, while osmosis specifically refers to the movement of water across a semipermeable membrane.

Front

What does it mean for a solution to be hypertonic?

Back

A hypertonic solution has a higher concentration of solutes compared to another solution, causing cells to lose water and shrink.

Front

What is active transport?

Back

Active transport is the movement of molecules against their concentration gradient, requiring energy (ATP) to do so.

Front

What is exocytosis?

Back

Exocytosis is the process by which large particles, such as waste materials, are expelled from the cell by vesicles fusing with the cell membrane.

Front

What is endocytosis?

Back

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

Front

Define isotonic solution.

Back

An isotonic solution has the same concentration of solutes as another solution, resulting in no net movement of water into or out of the cell.

Front

What role do transport proteins play in cell transport?

Back

Transport proteins assist in the movement of substances across the cell membrane, either by facilitated diffusion or active transport.

Front

What is the significance of concentration gradients in cell transport?

Back

Concentration gradients drive the movement of molecules; substances move from areas of high concentration to areas of low concentration.