Active and Passive Transport Review

Front

What is the primary function of the cell membrane?

Back

The cell membrane regulates which materials enter and leave the cell.

Front

Define diffusion in the context of cellular transport.

Back

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

Front

What occurs to a cell placed in a hypertonic solution?

Back

Water will move out of the cell, causing it to shrink.

Front

What is the common feature of exocytosis and endocytosis?

Back

Both processes involve a membrane surrounding material that needs to be moved in or out of a cell.

Front

When does diffusion stop in cells?

Back

Diffusion stops when equilibrium is reached.

Front

What is osmosis?

Back

Osmosis is the diffusion of water across a selectively permeable 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.

Front

What is a hypotonic solution?

Back

A hypotonic solution has a lower concentration of solutes compared to the inside of the cell, causing water to enter the cell.

Front

What happens to a cell in a hypotonic solution?

Back

Water enters the cell, which may cause it to swell and potentially burst.

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.