Cell Transport Practice

Front

What is an isotonic solution?

Back

An isotonic solution is one where the concentration of solutes is equal inside and outside the cell, resulting in no net movement of water across the cell membrane.

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.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is a type of passive transport that allows large or polar molecules to cross the cell membrane with the help of specific proteins.

Front

What is active transport?

Back

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

Front

What role does ATP play in cellular transport?

Back

ATP provides the energy required for active transport processes, allowing cells to move substances against their concentration gradients.

Front

What is a concentration gradient?

Back

A concentration gradient is the difference in the concentration of a substance across a space, which drives diffusion and other transport processes.

Front

What is osmosis?

Back

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

Front

What is the difference between passive and active transport?

Back

Passive transport does not require energy and moves substances down their concentration gradient, while active transport requires energy to move substances against their gradient.

Front

What is a selectively permeable membrane?

Back

A selectively permeable membrane is a barrier that allows certain substances to pass while blocking others, crucial for maintaining homeostasis in cells.

Front

What is the function of transport proteins?

Back

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