Passive Transport: Osmosis

Passive Transport: Osmosis

Passive Transport:

• is the movement of substances from high to low

• is does NOT require energy

Osmosis is:

• a form of diffusion

• it is ONLY for WATER!!!!

• it is the movement of water through a semi-permeable membrane from high to low

• water uses a special channel called an aquaporin

Water wants to:

• move from high concentration to low concentration

• move towards the solute (salt, sugar)

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When water moves into a cell:

• it is called hypotonic

• cells will swell and sometimes burst (lysis)

• it gives plants turgor

When water moves out of a cell:

• it is called hypertonic

• cells will shrink and shrivel up

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When water moves in and out of the cell at the same rate

• it is called isotonic

• animal cells are happiest in an isotonic solution!

Multiple Choice

Osmosis is a form of

• active transport

• passive transport

Multiple Choice

Osmosis is a form of:

• Facilitated Diffusion

• Endocytosis

• Diffusion

Multiple Choice

During osmosis water moves

• from high to low

• from low to high

• away from the solutes

Multiple Choice

Osmosis is ONLY for

• water

• carbon dioxide

• sugar

Multiple Choice

Water use a special channel called an

• aquaporin

• phospholipid

• tunnel

Multiple Choice

When water enters a cell towards a solute it is called

• isotonic

• hypertonic

• hypotonic

Multiple Choice

When water leaves a cell towards a solute it is called

• isotonic

• hypotonic

• hypertonic