Cell Unit Review

Front

What is facilitated diffusion?

Back

Facilitated diffusion is the process by which molecules, such as amino acids and ions, move across a cell membrane through channel proteins without the use of cellular energy.

Front

What is passive transport?

Back

Passive transport refers to the movement of materials in or out of the cell without the use of cellular energy.

Front

How do small molecules like carbon dioxide enter and exit the cell?

Back

Small molecules like carbon dioxide can move in and out of the cell through the phospholipid bilayer via simple diffusion.

Front

Who were the key contributors to the Cell Theory?

Back

Key contributors to the Cell Theory include Robert Hooke, Anton von Leeuwenhoek, Matthias Schleiden, and Rudolph Virchow.

Front

Which scientist was NOT a contributor to the Cell Theory?

Back

Charles Darwin was NOT a contributor to the Cell Theory.

Front

What are channel proteins?

Back

Channel proteins are proteins in the cell membrane that allow specific molecules to pass through, facilitating their movement across the membrane.

Front

What are pore proteins?

Back

Pore proteins are specialized proteins in the cell membrane that allow water molecules to move in and out of the cell.

Front

What is the phospholipid bilayer?

Back

The phospholipid bilayer is a double layer of phospholipids that makes up the cell membrane, allowing selective permeability for small molecules.

Front

What is simple diffusion?

Back

Simple diffusion is the process by which small or nonpolar molecules move across the cell membrane from an area of higher concentration to an area of lower concentration without energy.

Front

What role do proteins play in the cell membrane?

Back

Proteins in the cell membrane facilitate transport, act as receptors, and provide structural support.