CELL TRANSPORT

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 (ATP).

Front

What is passive transport?

Back

Passive transport is the movement of molecules across a cell membrane without the use of energy, moving from an area of higher concentration to an area of lower concentration.

Front

What is osmosis?

Back

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

Front

What is the sodium-potassium pump?

Back

The sodium-potassium pump is a type of active transport mechanism that moves sodium ions out of the cell and potassium ions into the cell against their concentration gradients.

Front

What is a semi-permeable membrane?

Back

A semi-permeable membrane is a barrier that allows certain molecules or ions to pass through while blocking others, crucial for maintaining homeostasis in cells.

Front

What happens to a cell in a hypotonic solution?

Back

In a hypotonic solution, a cell will swell and perhaps burst (lyse) due to the influx of water.

Front

What is the role of the cell membrane?

Back

The cell membrane controls the movement of substances into and out of the cell, maintaining the internal environment.

Front

What is diffusion?

Back

Diffusion is the process by which molecules spread from an area of high concentration to an area of low concentration until equilibrium is reached.

Front

What is filtration in the context of cell transport?

Back

Filtration is the process of separating particles from a fluid by passing the fluid through a filter, often driven by pressure.

Front

What is endocytosis?

Back

Endocytosis is the process by which cells engulf substances from their external environment, bringing them into the cell.