Passive Transport Flashcard Review

Front

What is facilitated diffusion?

Back

Facilitated diffusion is the movement of molecules through a membrane with the help of proteins, allowing substances to cross the membrane without the use of energy.

Front

What does equilibrium mean in the context of concentration?

Back

Equilibrium refers to a state where there are equal concentrations of a substance on both sides of a membrane, resulting in no net movement of molecules.

Front

Define simple diffusion.

Back

Simple diffusion is the movement of solute from an area of high concentration to an area of low concentration, occurring without the need for energy.

Front

What is the role of protein channels in facilitated diffusion?

Back

Protein channels assist in the movement of specific molecules across cell membranes along the concentration gradient, without using energy.

Front

What is osmosis?

Back

Osmosis is the diffusion of water across a selectively permeable membrane, moving from an area of low solute concentration to an area of high solute concentration.

Front

What is the difference between active transport and passive transport?

Back

Active transport requires energy to move substances against their concentration gradient, while passive transport occurs without energy, moving substances along their concentration gradient.

Front

What does isotonic mean?

Back

Isotonic refers to a solution that has the same concentration of solutes as another solution, resulting in no net movement of water.

Front

What is hypertonic solution?

Back

A hypertonic solution has a higher concentration of solutes compared to another solution, causing water to move out of cells, leading to cell shrinkage.

Front

What is hypotonic solution?

Back

A hypotonic solution has a lower concentration of solutes compared to another solution, causing water to move into cells, leading to cell swelling.

Front

Explain the concentration gradient.

Back

The concentration gradient is the difference in concentration of a substance across a space, driving the movement of molecules from high to low concentration.