Week 3 Practice Flashcard - Diffusion and Osmosis

Front

What is homeostasis?

Back

The balance between the cell and its environment maintained by controlling what goes in and out of the cell.

Front

What is osmosis?

Back

The movement of water through a semi-permeable membrane.

Front

What is diffusion?

Back

The movement of molecules from high concentration to low concentration.

Front

What does it mean for a cell membrane to be semi-permeable?

Back

It means that some molecules can pass through it, while others are too large.

Front

What is equilibrium in the context of diffusion?

Back

When molecules have reached an equal balance in concentration.

Front

What is the role of the cell membrane?

Back

To control the movement of substances in and out of the cell.

Front

How does temperature affect diffusion?

Back

Higher temperatures increase the energy of molecules, leading to faster diffusion.

Front

What is the difference between active transport and passive transport?

Back

Active transport requires energy to move substances against their concentration gradient, while passive transport does not.

Front

What is a concentration gradient?

Back

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

Front

What is facilitated diffusion?

Back

The process of passive transport of molecules across a cell membrane via specific transmembrane integral proteins.