Cell membrane and cell transport

Front

What is the primary function of the cell membrane?

Back

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

Front

Define homeostasis in the context of cell biology.

Back

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

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 enter the cell.

Front

What role do channel proteins play in the cell membrane?

Back

Channel proteins facilitate the transport of specific substances across the cell membrane.

Front

What is passive transport?

Back

Passive transport is the movement of molecules across the cell membrane without the use of energy.

Front

What type of energy does passive transport use?

Back

Passive transport uses no energy.

Front

What is the difference between active and passive transport?

Back

Active transport requires energy to move substances against their concentration gradient, while passive transport does not.

Front

What happens to a cell in a hypertonic solution?

Back

In a hypertonic solution, water leaves the cell, causing it to shrink.

Front

What is osmosis?

Back

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

Front

What is the significance of the fluid mosaic model?

Back

The fluid mosaic model describes the structure of the cell membrane as a flexible layer of lipids with embedded proteins that can move laterally.