The Cell Membrane and Cell Transport

Front

What is the function of the cell membrane?

Back

The cell membrane helps maintain homeostasis by controlling what enters and exits the cell.

Front

What is the lipid bilayer?

Back

The lipid bilayer is a double layer of lipids that makes up the cell membrane, providing a barrier to protect the cell.

Front

What is passive transport?

Back

Passive transport is the movement of substances across the cell membrane without the use of energy, moving from high to low concentration.

Front

What is active transport?

Back

Active transport is the movement of substances across the cell membrane using energy, moving from low to high concentration.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is a type of passive transport that uses proteins to help move molecules across the cell membrane.

Front

What role do proteins play in the cell membrane?

Back

Proteins in the cell membrane help with transport, communication, and structural support.

Front

What are sugar chains in the cell membrane?

Back

Sugar chains, or carbohydrates, are attached to proteins and lipids in the cell membrane and play a role in cell recognition.

Front

What does it mean for a membrane to be selectively permeable?

Back

A selectively permeable membrane allows certain substances to pass while blocking others.

Front

What is osmosis?

Back

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

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.