Diffusion and Osmosis

What is a solute?

• A substance dissolved in another substance

• the substance doing the dissolving

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

How long does diffusion last?

• Until the concentration of particles in the system is equal

• (Select this answer and I swear i'll make it harder for you in the assessment task)

• Until a region in the system has a greater concentration of particles than the other

• Until the particles disappear from the system

Tags

NGSS.MS-PS1-4

Which of the following describes molecules moving down a concentration gradient?

• Sugar settling at the bottom of a water glass

• A cell with lots of water in it absorbing even more water

• A bottle of soda in which bubbles of carbon dioxide are evenly distributed

• Warm air moving from a radiator to fill up a room

Why is diffusion so important in biology?

• It's the basic power source for most types of cells

• It allows substances to move across cell membranes

• It prevents toxins from entering our bodies

• Without diffusion, cell division could not take place

Diffusion is the movement of particles from an area of _____ concentration to an area of ______ concentration

• High, Low

• Low, High

• Low, Low

• High, High

Osmosis is the movement of _____ across a membrane.

• food

• energy

• oxygen

• water

Tags

NGSS.MS-LS1-3

During osmosis

• water moves from high to low concentration

• large or oddly shaped molecules move across a cell membrane

• water moves when energy is used

• proteins are built

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 
  

Tags

NGSS.MS-LS1-2

_______ regulates what enters and leaves a cell.

• Cell Membrane

• Nucleus

• Mitochondria

• Cytoplasm

Tags

NGSS.MS-LS1-2