AP Biology Tonicity

Front

What is tonicity?

Back

Tonicity refers to the ability of a solution to cause a cell to gain or lose water, affecting the cell's shape and function.

Front

What happens to a cell in a hypertonic solution?

Back

In a hypertonic solution, water moves out of the cell, causing it to shrink.

Front

What happens to a cell in a hypotonic solution?

Back

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

Front

What is an isotonic solution?

Back

An isotonic solution has the same concentration of solutes as the cell, resulting in no net movement of water.

Front

What regulates what enters and leaves a cell?

Back

The Cell Membrane regulates what enters and leaves a cell.

Front

What are the three types of passive transport?

Back

The three types of passive transport are Osmosis, Diffusion, and Facilitated diffusion.

Front

Define osmosis.

Back

Osmosis is the diffusion of water across a selectively permeable membrane.

Front

What is diffusion?

Back

Diffusion is the movement of molecules from an area of higher concentration to an area of lower concentration.

Front

What is facilitated diffusion?

Back

Facilitated diffusion is the process of transporting molecules across a membrane via protein channels without energy.

Front

What is the role of transport proteins?

Back

Transport proteins help move substances across the cell membrane that cannot directly diffuse through the lipid bilayer.