Active and Passive Transport Concepts

Front

What do channel proteins do in a cell membrane?

Back

Channel proteins facilitate the transport of specific substances across a cell membrane by forming a passageway.

Front

What is osmosis?

Back

Osmosis is the movement of water molecules across a selectively permeable membrane from an area of lower solute concentration to an area of higher solute concentration.

Front

What type of transport is osmosis classified as?

Back

Osmosis is classified as passive transport.

Front

What is diffusion?

Back

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

Front

What is homeostasis?

Back

Homeostasis is the process by which living organisms maintain a stable internal environment despite changes in external conditions.

Tags

NGSS.HS-LS1-3

Front

What role do carrier proteins play in active transport?

Back

Carrier proteins bind to specific molecules and change shape to transport them across the membrane against their concentration gradient.

Front

What is the difference between active and passive transport?

Back

Active transport requires energy (ATP) to move substances against their concentration gradient, while passive transport does not require energy and moves substances along their concentration gradient.

Front

What is a selectively permeable membrane?

Back

A selectively permeable membrane allows certain molecules to pass through while blocking others, maintaining the internal environment of the cell.

Front

What is the concentration gradient?

Back

The concentration gradient is the difference in the concentration of a substance across a space, which drives the movement of molecules during diffusion and osmosis.

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.

Tags

NGSS.HS-LS1-3