Cell Transport

Front

What is facilitated diffusion?

Back

Facilitated diffusion is the process by which molecules move across a cell membrane through channel proteins, without the use of energy.

Front

What direction does oxygen move if there is 25% oxygen inside the cell and 50% outside?

Back

Oxygen will move into the cell, from an area of higher concentration (outside) to an area of lower concentration (inside).

Front

What is a selectively permeable membrane?

Back

A selectively permeable membrane is a type of biological membrane that allows certain molecules to pass through while blocking others.

Front

True or False: Passive transport moves molecules from low concentration to high concentration.

Back

False. Passive transport moves molecules from high concentration to low concentration.

Front

Which of the following is NOT a type of passive transport?

Back

Endocytosis is not a type of passive transport; it is an active transport process.

Front

Define osmosis.

Back

Osmosis is the movement of water molecules through a selectively permeable membrane from an area of low solute concentration to an area of high solute concentration.

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 role do channel proteins play in facilitated diffusion?

Back

Channel proteins provide a passageway for specific molecules to cross the cell membrane during facilitated diffusion.

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 concentration gradient.

Front

What is endocytosis?

Back

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