Cell Membrane and Transport

Front

What is the function of protein channels in the cell membrane?

Back

Protein channels help non-VIP molecules pass through the membrane from a high concentration to a low concentration.

Front

What type of transport requires energy to move molecules against their concentration gradient?

Back

Active transport.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is a type of passive transport that uses protein channels to help molecules move across the cell membrane from high to low concentration.

Front

What happens to a cell in a hypertonic solution?

Back

The cell will shrink due to water moving out of it.

Front

What is osmosis?

Back

Osmosis is the passive transport of water molecules across a selectively permeable membrane from an area of low solute concentration to an area of high solute concentration.

Front

What is the difference between passive and active transport?

Back

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

Front

What role do protein pumps play in the cell membrane?

Back

Protein pumps actively transport molecules across the membrane against their concentration gradient, requiring energy.

Front

What is a hypertonic solution?

Back

A hypertonic solution has a higher concentration of solutes compared to the inside of the cell, causing water to move out of the cell.

Front

What is a hypotonic solution?

Back

A hypotonic solution has a lower concentration of solutes compared to the inside of the cell, causing water to move into the cell.

Front

What is isotonic solution?

Back

An isotonic solution has an equal concentration of solutes inside and outside the cell, resulting in no net movement of water.