Cell Membrane and Cell Transport

Front

What is the main function of the cell membrane?

Back

The cell membrane regulates what enters and leaves the cell, maintaining homeostasis.

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

Define active transport.

Back

Active transport is the movement of substances across a cell membrane using energy, typically against a concentration gradient.

Front

What is the Fluid Mosaic Model?

Back

The Fluid Mosaic Model describes the cell membrane as a flexible structure composed of various proteins and lipids that can move laterally within the layer.

Front

What happens to a cell in a hypertonic solution?

Back

In a hypertonic solution, water moves out of the cell, causing it to shrink.

Front

What happens to a cell in a hypotonic solution?

Back

In a hypotonic solution, water moves into the cell, causing it to swell and potentially burst.

Front

What is homeostasis?

Back

Homeostasis is the process by which a cell or organism maintains a stable internal environment despite external changes.

Front

What is osmosis?

Back

Osmosis is the diffusion of water across a selectively permeable membrane.

Front

What is the difference between diffusion and facilitated diffusion?

Back

Diffusion is the movement of molecules from an area of high concentration to low concentration, while facilitated diffusion uses specific transport proteins to help move molecules across the membrane.

Front

What role do transport proteins play in cell transport?

Back

Transport proteins assist in the movement of substances across the cell membrane, either passively or actively.