4. Amoeba Sisters Cell Transport (Modified)

Front

What is the definition of polar molecules?

Back

Polar molecules are molecules that have an unequal sharing of electrons among atoms, resulting in a partial positive charge on one side and a partial negative charge on the other.

Front

What are two characteristics of molecules that can easily pass through the cell membrane?

Back

Molecules that can easily pass through the cell membrane are typically small and nonpolar.

Front

What type of transport does NOT require ATP?

Back

Passive transport does not require the cell to use ATP.

Front

What does it mean for molecules to move with the concentration gradient?

Back

It means that molecules are moving from an area of high concentration to an area of low concentration.

Front

What is an aquaporin?

Back

An aquaporin is a type of protein that facilitates the movement of water through the cell membrane.

Front

What is the main difference between passive and active transport?

Back

Passive transport does not require energy (ATP) and moves substances down their concentration gradient, while active transport requires energy to move substances against their concentration gradient.

Front

What is diffusion?

Back

Diffusion is the process by which molecules spread from an area of high concentration to an area of low concentration.

Front

What is osmosis?

Back

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

Front

What is the role of the sodium-potassium pump?

Back

The sodium-potassium pump is an active transport mechanism that moves sodium ions out of the cell and potassium ions into the cell, maintaining the cell's electrochemical gradient.

Front

What is facilitated diffusion?

Back

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