Cell Membrane and Transport Practice

Front

What is the cell membrane?

Back

The cell membrane is a biological membrane that separates and protects the interior of all cells from the outside environment. It is selectively permeable, allowing certain substances to pass while blocking others.

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, using energy in the form of ATP.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is the process of passive transport of molecules across a cell membrane via specific transmembrane integral proteins.

Front

What happens to an animal cell in a hypertonic solution?

Back

An animal cell will shrink in a hypertonic solution due to the loss of water.

Front

What is 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 role of ATP in active transport?

Back

ATP provides the energy required for active transport processes, enabling the movement of substances against their concentration gradient.

Front

What is a hypotonic solution?

Back

A hypotonic solution is one where the concentration of solutes is lower outside the cell than inside, causing water to flow into the cell, potentially leading to swelling or bursting.

Front

What is a hypertonic solution?

Back

A hypertonic solution is one where the concentration of solutes is higher outside the cell than inside, causing water to flow out of the cell, leading to shrinkage.

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 are transport proteins?

Back

Transport proteins are proteins that assist in the movement of ions and molecules across the cell membrane.