Diffusion and Transport Mechanisms in Cells

Flashcards covering key concepts from the lecture on diffusion, osmosis, facilitated diffusion, active transport, and vesicular transport mechanisms.

Diffusion is the movement of molecules from an area of high concentration to an area of __ concentration.

low

The difference in concentration across the membrane is called __.

concentration gradient

Movement of materials across a cell membrane through diffusion is called __ transport.

passive

Osmosis is the movement of water molecules from an area of high water concentration to __ concentration.

low

The main difference between osmosis and diffusion is that osmosis specifically refers to the movement of __.

water

A cell surrounded by high salt concentration is called a __ cell.

hypertonic

The movement of substances through specific proteins embedded in the cell membrane refers to __ diffusion.

facilitated

Channel proteins and carrier proteins are types of __ proteins that assist in the transport of molecules across the membrane.

membrane

The process of moving molecules against their concentration gradient using energy is known as __ transport.

active

The process when large molecules are taken into the cell using vesicles is called __.

endocytosis

The process of expelling materials from the cell using vesicles is known as __.

exocytosis