Cellular Transport Flashcard

Front

What does it mean that the cell membrane is semi-permeable?

Back

It means that the cell membrane allows some substances to pass through while blocking others.

Front

What is homeostasis in the context of cellular transport?

Back

Homeostasis is the maintenance of a constant internal environment within cells, even when external conditions change.

Front

What is equilibrium?

Back

Equilibrium is a balanced state where the concentrations of substances are equal on both sides of a membrane.

Front

How does diffusion work in cellular transport?

Back

Diffusion is the process by which molecules move from an area of higher concentration to an area of lower concentration, helping to bring substances into and expel them from the cell.

Front

Do all types of transport in and out of the cell require energy?

Back

No, not all types of transport require energy; passive transport does not require energy, while active transport does.

Front

What is passive transport?

Back

Passive transport is the movement of substances across a cell membrane without the use of energy, typically along the concentration gradient.

Front

What is active transport?

Back

Active transport is the movement of substances against their concentration gradient, requiring energy, usually in the form of ATP.

Front

What role do transport proteins play in cellular transport?

Back

Transport proteins facilitate the movement of substances across the cell membrane, either passively or actively.

Front

What is osmosis?

Back

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