Passive Transport

Front

What is passive transport?

Back

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

Front

What are the main types of passive transport?

Back

The main types of passive transport are diffusion, osmosis, and facilitated diffusion.

Front

Define diffusion in the context of passive transport.

Back

Diffusion is the process by which molecules move from an area of higher concentration to an area of lower concentration.

Front

What is osmosis?

Back

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

Front

What role does the cell membrane play in passive transport?

Back

The cell membrane controls what substances may enter or leave the cell, maintaining homeostasis.

Front

Does passive transport require energy?

Back

No, passive transport does not require energy.

Front

What is a concentration gradient?

Back

A concentration gradient is the difference in the concentration of a substance across a space.

Front

How does facilitated diffusion differ from simple diffusion?

Back

Facilitated diffusion involves the use of transport proteins to help move substances across the membrane, while simple diffusion does not.

Front

What is the significance of water in osmosis?

Back

Water is essential in osmosis as it moves across membranes to balance solute concentrations on both sides.

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.