Cell Transport (Unit 2 Test Remediation)

Front

What is diffusion?

Back

Diffusion is the movement of molecules from an area of high concentration to an area of low concentration until equilibrium is reached.

Front

What is osmosis?

Back

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

Front

Define hypertonic solution.

Back

A hypertonic solution has a higher concentration of solute (e.g., salt) compared to another solution.

Front

Define hypotonic solution.

Back

A hypotonic solution has a lower concentration of solute compared to another solution.

Front

What happens to a cell in a hypertonic solution?

Back

Water will leave the cell, causing it to shrink.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is the process of passive transport of molecules across a cell membrane via a protein channel.

Front

What is active transport?

Back

Active transport is the movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration, requiring energy.

Front

What is an isotonic solution?

Back

An isotonic solution has equal concentrations of solute on both sides of a membrane, resulting in no net movement of water.

Front

What role do carrier proteins play in cell transport?

Back

Carrier proteins help transport substances across the cell membrane, particularly during facilitated diffusion and active transport.

Front

What is the difference between passive and active transport?

Back

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