Cell Membrane Introduction

In passive transport, the concentration gradient goes from..

• Low to low

• High to low

• Low to high

• High to high

The cellular process in which materials are moved across a membrane from an area of low concentration to an area of high concentration is called

• Osmosis
• Simple Diffusion
• Active Transport
• Passive Transport 

Describe the movement of molecules in the illustration.

• Molecules are moving from a lower concentration to a higher concentration.

• Molecules are moving from a higher concentration to a lower concentration.

• Molecules are moving from a higher concentration to a lower concentration and then from a lower to higher concentration.

• Molecules are moving from a lower concentration to a higher concentration and then from a higher concentration to a lower concentration.

Tags

NGSS.HS-LS2-3

How is diffusion different from this process?

•  Diffusion takes place due to osmotic pressure. 
• Diffusion requires cellular energy for the transfer of molecules.
• Diffusion requires protein channels as a passage-way for particles
• Diffusion transfers particles from an area of high to low concentration. 

Osmosis is the diffusion of __________.

• water
• glucose
• air
• passive transport

Passive transport requires no

• concentration gradients
• osmosis
• motion
• energy

This cell organelle helps organisms maintain homeostasis by controlling what substances may enter or leave cells.

• vacuole
• nucleus
• cell membrane
• cell wall

Tags

NGSS.HS-LS1-3

Large molecules, such as glucose, can easily pass through the cell membrane without any help...

• True- they pass right through
• False- they need a protein channel 

When particles move out of a cell through facilitated diffusion, the cell ____________.

• Gains energy
• Uses energy
• Releases energy
• Does not use energy

Which type of Passive Transport is being represented in this picture?

• Passive Diffusion
• Simple Diffusion
• Active Diffusion
• Facilitated Diffusion