Passive Transport: Simple, Facilitated, and Osmosis

Front

What is passive transport?

Back

Passive transport is the movement of molecules across a cell membrane without the use of energy, relying on concentration gradients.

Front

What is the role of the plasma membrane in cellular homeostasis?

Back

The plasma membrane controls which molecules enter and exit the cell, helping to maintain stable internal conditions.

Front

Define homeostasis.

Back

Homeostasis is the process by which a cell or organism maintains stable internal conditions despite changes in the external environment.

Front

What is osmosis?

Back

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

Front

What is simple diffusion?

Back

Simple diffusion is the movement of molecules directly through the cell membrane from a region of high concentration to a region of low concentration without the use of energy or transport proteins.

Front

What is facilitated diffusion?

Back

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

Front

What is a selectively permeable membrane?

Back

A selectively permeable membrane allows certain molecules to pass through while blocking others, crucial for maintaining homeostasis.

Front

What is the difference between passive and active transport?

Back

Passive transport does not require energy, while active transport requires energy to move molecules against their concentration gradient.

Front

Give an example of a molecule that uses facilitated diffusion.

Back

Glucose is an example of a molecule that uses facilitated diffusion to enter cells through specific transport proteins.

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.