Match the transport mechanisms with their descriptions. (1)...

Match the transport mechanisms with their descriptions. (1) diffusion (2) facilitated diffusion (3) filtration (4) active transport (5) endocytosis (6) exocytosis A. the cell membrane engulfs a particle or substance, drawing it into the cell in a vesicle B. movement down the concentration gradient with a carrier protein, without energy input C. movement down the concentration gradient without a carrier protein or energy input D. a particle or substance leaves a cell in a vesicle that merges with the cell membrane E. movement against the concentration gradient with energy input F. hydrostatic pressure forces substances through membranes

Match the transport mechanisms with their descriptions.
(1) diffusion
(2) facilitated diffusion
(3) filtration
(4) active transport
(5) endocytosis
(6) exocytosis
A. the cell membrane engulfs a particle or substance, drawing it into the cell in a vesicle
B. movement down the concentration gradient with a carrier protein, without energy input
C. movement down the concentration gradient without a carrier protein or energy input

D. a particle or substance leaves a cell in a vesicle that merges with the cell membrane
E. movement against the concentration gradient with energy input
F. hydrostatic pressure forces substances through membranes

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Key Concepts

Diffusion

A process by which molecules move passively from an area of higher concentration to an area of lower concentration without the need for energy or specific transport proteins.

Facilitated Diffusion

A passive transport mechanism where molecules move down their concentration gradient with the assistance of a carrier protein or channel, which helps substances that cannot easily cross the cell membrane.

Filtration

A process driven by hydrostatic pressure that forces fluids and solutes through a membrane, allowing the movement of substances independent of their concentration gradients.

Active Transport

A mechanism that moves substances against their concentration gradient, requiring energy, typically in the form of ATP, to facilitate the transport.

Endocytosis

A cellular process in which the cell membrane engulfs external substances, enclosing them in a vesicle to bring them into the cell, often a form of particulate intake.

Exocytosis

A process where intracellular vesicles fuse with the cell membrane to release their contents to the extracellular space, serving as a method for expelling waste or secreting molecules.

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