G7 Overview

What does a 'region with high concentration' mean?

• SMALL number of particles

• LARGE number of particles

• UNEVEN number of particles

• no particles

The picture below is an example of _________________.

• osmosis

• isotonic

• diffusion

• active transport

What is the definition of  Selective Permeability?

• The movement of materials across the cell membrane that requires NO ENERGY from the cell.
  
• The movement of materials through (or across) the cell membrane
  
• The ability of the cell membrane to allow some things to pass through while preventing other things from passing through.
• The movement of molecules from an area of high concentration to a area of low concentration 
  

How do the particles move in diffusion?

• From a region of low concentration to a region of high concentration

• From a region of high concentration to a region of low concentration

• From a region of low concentration to a region of low concentration

• From a region of high concentration to a region of high concentration

Which of the following is a function (job) of the cell membrane>

• breaks down lipids, carbohydrates, and proteins from food

• stores water, salt, proteins, and carbs

• keeps the cell wall in place

• regulates the movement of materials into and out of the cell

What is the diffusion of water only across a cell or semi-permeable membrane?

• Osmosis
• Diffusion
• Active Transport
• Passive Transport

In the given scenario what will happen?  An egg is placed in distilled water for 48 hours.

• The egg will gain water and swell.
• Water will move in and out of the cell equally, and the cell with neither shrink nor swell.
• The egg will lose water and shrink.

Passive transport requires no

• concentration gradients
• osmosis
• motion
• energy

What type of cellular transport uses energy?

• Passive Transport
• Active Transport

Active transport requires energy because...

• The cell is moving something against a concentration gradient (from a lower concentration into a higher concentration)

• The cell is moving something with a concentration gradient (from a higher concentration to a lower concentration)