Passive Transport Review

Front

What is osmosis?

Back

Osmosis is the diffusion of water across a selectively permeable membrane from an area of low solute concentration to an area of high solute concentration.

Front

What is a hypotonic solution?

Back

A hypotonic solution is one where the concentration of solutes outside the cell is lower than the concentration inside the cell, causing water to enter the cell.

Front

What is diffusion?

Back

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

Front

What type of molecules can easily pass through the phospholipid bilayer?

Back

Small, non-polar molecules can easily pass through the phospholipid bilayer due to their size and lack of charge.

Front

What is facilitated diffusion?

Back

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

Front

What is the difference between passive and active transport?

Back

Passive transport does not require energy and moves substances down their concentration gradient, while active transport requires energy to move substances against their concentration gradient.

Front

What is equilibrium in the context of diffusion?

Back

Equilibrium is the state reached when the concentration of molecules is equal on both sides of a membrane, resulting in no net movement.

Front

What role do transport proteins play in facilitated diffusion?

Back

Transport proteins assist in the movement of larger or polar molecules across the cell membrane that cannot pass through the lipid bilayer directly.

Front

What happens to a cell in a hypertonic solution?

Back

In a hypertonic solution, the concentration of solutes outside the cell is higher than inside, causing water to leave the cell and potentially leading to cell shrinkage.

Front

What is a isotonic solution?

Back

An isotonic solution has equal concentrations of solutes inside and outside the cell, resulting in no net movement of water.