Introduction to Membrane Transport exam Flashcards

A property of biological membranes that allows some substances to cross more easily than others.

Small, uncharged, and nonpolar molecules.

The movement of molecules across a cell membrane without the use of energy by the cell.

Passive transport does not require energy, while active transport requires energy.

A process by which a cell takes in large molecules by engulfing them in a vesicle.

Proteins help transport larger, charged, or polar molecules across the membrane.

The diffusion of water across a selectively permeable membrane.

Large, charged, and polar molecules.

A process by which a cell expels large molecules by fusing a vesicle with the plasma membrane.

The movement of large molecules across the membrane via endocytosis or exocytosis.

The process of spontaneous passive transport of molecules or ions across a biological membrane via specific transmembrane integral proteins.

It is crucial for maintaining cellular homeostasis and function.

Active transport that relies directly on the hydrolysis of ATP.

Transport that uses the energy from the electrochemical gradient created by primary active transport.

A type of endocytosis where a cell engulfs large particles or cells.

A type of endocytosis where a cell engulfs extracellular fluid and its dissolved solutes.

The movement of molecules from an area of higher concentration to an area of lower concentration without the aid of proteins.

A type of endocytosis where specific molecules are ingested into the cell after binding to receptors on the cell surface.

Water-fearing; typically nonpolar molecules that do not dissolve in water.

The cytosol is the intracellular fluid where molecules are transported to and from across the membrane.

Water-loving; typically polar molecules that dissolve in water.

Molecular transport and bulk transport.

Another term for selectively permeable, meaning partially penetrable.

They help move molecules across the membrane that cannot diffuse freely.

It provides the energy needed for secondary active transport.

Molecular transport involves small molecules, while bulk transport involves large molecules.