Cell Transport Review

Front

What is exocytosis?

Back

Exocytosis is a process where cells expel materials in vesicles that fuse with the cell membrane, releasing their contents outside the cell.

Front

What is active transport?

Back

Active transport is the movement of substances across a cell membrane against their concentration gradient, requiring energy (ATP).

Front

What is endocytosis?

Back

Endocytosis is the process by which cells engulf substances from the outside environment, forming a vesicle to bring them into the cell.

Front

What is the role of the cell membrane in transport?

Back

The cell membrane regulates what enters and exits the cell, maintaining homeostasis and allowing for communication with the environment.

Front

What is diffusion?

Back

Diffusion is the passive movement of molecules from an area of higher concentration to an area of lower concentration until equilibrium is reached.

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

What is the sodium-potassium pump?

Back

The sodium-potassium pump is an active transport mechanism that moves sodium ions out of the cell and potassium ions into the cell, crucial for maintaining cellular function.

Front

What is passive transport?

Back

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

Front

What is a vesicle?

Back

A vesicle is a small membrane-bound sac that transports materials within a cell or to the cell membrane for exocytosis.

Front

What is concentration gradient?

Back

A concentration gradient is the difference in the concentration of a substance across a space, driving the movement of molecules during diffusion.