Cell Transport

Front

What is cell transport?

Back

Cell transport refers to the movement of substances across the cell membrane, which can occur through various mechanisms such as diffusion, osmosis, and active transport.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is a passive transport process that uses proteins to help move molecules across the cell membrane from an area of high concentration to an area of low concentration without using energy.

Front

What is active transport?

Back

Active transport is the movement of molecules across a cell membrane from an area of low concentration to an area of high concentration, requiring energy (ATP) to do so.

Front

What role do proteins play in cell transport?

Back

Proteins act as channels or pumps in the cell membrane, facilitating the movement of molecules in and out of the cell.

Front

What are phospholipids?

Back

Phospholipids are a type of lipid that make up the majority of the cell membrane, consisting of a hydrophilic (water-attracting) head and two hydrophobic (water-repelling) tails.

Front

What is osmosis?

Back

Osmosis is the movement of water molecules through a selectively permeable membrane from an area of high water concentration to an area of low water concentration.

Front

What is the difference between passive and active transport?

Back

Passive transport does not require energy and moves substances from high to low concentration, while active transport requires energy to move substances from low to high concentration.

Front

What is a selectively permeable membrane?

Back

A selectively permeable membrane allows certain substances to pass through while blocking others, maintaining the internal environment of the cell.

Front

What is the concentration gradient?

Back

The concentration gradient is the difference in the concentration of a substance between two areas, which drives the movement of molecules during diffusion.

Front

What is the function of the cell membrane?

Back

The cell membrane protects the cell, provides structure, and regulates the movement of substances in and out of the cell.