Cell Transport

Front

What is Simple Diffusion?

Back

Simple diffusion is the process by which molecules move from an area of higher concentration to an area of lower concentration without the need for energy or assistance from proteins.

Front

What is Facilitated Diffusion?

Back

Facilitated diffusion is a type of passive transport that uses transport proteins to help move molecules across a membrane from an area of higher concentration to an area of lower concentration.

Front

What does isotonic mean in terms of solute concentration?

Back

Isotonic refers to a solution where the concentration of solutes is the same on both sides of a membrane, resulting in no net movement of water.

Front

What is Osmosis?

Back

Osmosis is the diffusion of water molecules across a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration.

Front

Why is passive transport called 'passive'?

Back

Passive transport is called 'passive' because it does not require energy to occur; it relies on the natural movement of molecules down their concentration gradient.

Front

What is Active Transport?

Back

Active transport is the movement of molecules across a membrane against their concentration gradient, requiring energy (usually in the form of ATP).

Front

What is the difference between hypertonic and hypotonic solutions?

Back

A hypertonic solution has a higher concentration of solutes compared to another solution, causing cells to lose water. A hypotonic solution has a lower concentration of solutes, causing cells to gain water.

Front

What role do transport proteins play in cell transport?

Back

Transport proteins facilitate the movement of specific molecules across the cell membrane, either through facilitated diffusion or active transport.

Front

What is a concentration gradient?

Back

A concentration gradient is the difference in the concentration of a substance across a space, which drives the movement of molecules from high to low concentration.

Front

What happens to a cell in a hypertonic solution?

Back

In a hypertonic solution, water moves out of the cell, causing it to shrink or crenate.