Cell Transport

Front

What is endocytosis?

Back

Endocytosis is the process by which many molecules come into the cell using a membrane vesicle.

Front

What is exocytosis?

Back

Exocytosis is the process by which many molecules come out of the cell using a vesicle that fuses with the membrane.

Front

How does the cell membrane maintain homeostasis?

Back

The cell membrane controls the movement of substances in and out of the cell.

Front

What is the main difference between passive and active transport?

Back

The main difference is that active transport requires energy, while passive transport does not.

Front

What occurs during osmosis?

Back

Osmosis is the movement of water molecules from an area of high water concentration to an area of low water concentration.

Front

What are phospholipids?

Back

Phospholipids are molecules that make up the cell membrane, having hydrophilic (water-attracting) heads and hydrophobic (water-repelling) tails.

Front

What is diffusion?

Back

Diffusion is the process of small molecules crossing the lipid bilayer from an area of high concentration to an area of low concentration.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is the process by which large molecules cross the cell membrane through a protein.

Front

What is the role of the cell membrane?

Back

The cell membrane acts as a barrier that controls what enters and exits the cell, helping to maintain homeostasis.

Front

What is a concentration gradient?

Back

A concentration gradient is the difference in the concentration of a substance across a space.