Cell Transport Flashcard

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 special channel allows water to move through the membrane during osmosis?

Back

Aquaporin is a special channel that facilitates the movement of water through the cell membrane during osmosis.

Front

What happens to cells in an isotonic solution?

Back

Cells are 'happy' in an isotonic solution because the concentration of solutes is equal inside and outside the cell, resulting in no net movement of water.

Front

Does passive transport require ATP?

Back

No, passive transport does not require ATP; it relies on the natural movement of molecules from high to low concentration.

Front

What type of transport is used for particles too large to pass through the membrane without energy?

Back

Facilitated diffusion is used for particles too large to pass through the membrane, requiring assistance from channel proteins but no energy.

Front

Define osmosis.

Back

Osmosis is the movement of water molecules through a selectively permeable membrane from an area of lower solute concentration to an area of higher 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 does not require energy and moves substances along their concentration gradient.

Front

What role do channel proteins play in facilitated diffusion?

Back

Channel proteins provide a pathway for specific molecules to pass through the cell membrane during facilitated diffusion.

Front

What is a selectively permeable membrane?

Back

A selectively permeable membrane allows certain molecules to pass through while blocking others, maintaining the internal environment of the cell.

Front

What is the significance of ATP in active transport?

Back

ATP provides the energy required for active transport to move molecules against their concentration gradient.