HAP - Ch, 3 - Cells & Membrane Transport Review

Front

What is diffusion?

Back

Diffusion is the passive movement of molecules from an area of higher concentration to an area of lower concentration until equilibrium is reached.

Front

What happens to a cell in a hypertonic solution?

Back

In a hypertonic solution, water moves from the inside of the cell to the surrounding solution, causing the cell to shrink.

Front

What is exocytosis?

Back

Exocytosis is an active transport process where cells expel materials in vesicles that fuse with the plasma membrane.

Front

What is endocytosis?

Back

Endocytosis is the process by which cells take in materials by engulfing them in a vesicle.

Front

What occurs when a cell is placed in a hypotonic solution?

Back

In a hypotonic solution, water moves from the solution into the cell, causing the cell to swell and potentially burst.

Front

Define osmosis.

Back

Osmosis is the passive 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 facilitated diffusion?

Back

Facilitated diffusion is a type of passive transport that uses protein channels to help move molecules across the cell membrane.

Front

What is the difference between active and passive transport?

Back

Active transport requires energy to move substances against their concentration gradient, while passive transport does not require energy and moves substances along their concentration gradient.

Front

What role do cell membranes play in transport?

Back

Cell membranes regulate the movement of substances in and out of the cell, maintaining homeostasis.

Front

What is a vesicle?

Back

A vesicle is a small membrane-bound sac that transports materials within a cell or to the cell's exterior.