Cell Membrane and Transport

Front

What is the function of the cell membrane?

Back

The cell membrane controls the movement of substances in and out of the cell, providing protection and support.

Front

Define Passive Transport.

Back

Passive transport is the movement of substances across a cell membrane without the use of energy, following the concentration gradient.

Front

What is Facilitated Diffusion?

Back

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

Front

What are Phospholipids?

Back

Phospholipids are molecules that make up the cell membrane, consisting of a hydrophilic head and two hydrophobic tails.

Front

What does Selectively Permeable mean?

Back

Selectively permeable means that the cell membrane allows certain substances to pass while blocking others.

Front

What is the difference between Active Transport and Passive Transport?

Back

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

Front

What is Osmosis?

Back

Osmosis is the diffusion of water molecules through a selectively permeable membrane.

Front

Explain the term 'Concentration Gradient'.

Back

A concentration gradient is the difference in the concentration of a substance across a space, which drives diffusion.

Front

What role do protein channels play in the cell membrane?

Back

Protein channels facilitate the transport of specific molecules across the cell membrane, especially in facilitated diffusion.

Front

What is the significance of the Hydrophilic Head in phospholipids?

Back

The hydrophilic head of phospholipids interacts with water, allowing the formation of the cell membrane in an aqueous environment.