Cell Transport

Front

What are phospholipids?

Back

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

Front

What is the structure of the cell membrane?

Back

The cell membrane is a phospholipid bilayer with embedded proteins, carbohydrates, and cholesterol, allowing it to be selectively permeable.

Front

What is selective permeability?

Back

Selective permeability is the property of the cell membrane that allows certain substances to pass through while blocking others.

Front

What role do proteins play in cell transport?

Back

Proteins facilitate the transport of large molecules across the cell membrane, acting as channels or carriers.

Front

What is diffusion?

Back

Diffusion is the passive movement of molecules from an area of higher concentration to an area of lower concentration.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is the process by which large or polar molecules cross the cell membrane with the help of transport proteins.

Front

What is active transport?

Back

Active transport is the movement of molecules against their concentration gradient, requiring energy (ATP) to do so.

Front

What is endocytosis?

Back

Endocytosis is the process by which cells engulf large molecules or particles by wrapping them in the cell membrane to form a vesicle.

Front

What is exocytosis?

Back

Exocytosis is the process by which cells expel large molecules or particles by fusing a vesicle with the cell membrane.

Front

How does the cell membrane maintain homeostasis?

Back

The cell membrane maintains homeostasis by regulating the movement of substances in and out of the cell, ensuring a stable internal environment.