Cell Transport

​Cell Transport

By GHS Biology

Please take out your notes!

Multiple Choice

Which type of cell transport REQUIRES energy?

• Passive transport

• Active transport

Multiple Choice

What kind of cell transport is osmosis?

• Passive transport

• Active transport

Multiple Choice

What kind of solution would cause a cell to shrink by osmosis?

• Hypotonic

• Hypertonic

• Isotonic

Multiple Choice

Which organelle regulates movement of things in and out of the cell?

(Hint: Allows things to enter and exit the cell)

• Cell membrane

• Cell wall

• Mitochondria

• Chloroplast

Objective

Explain the role of cell membranes as a highly selective barrier during passive and active transport.

• Diffusion

• Osmosis

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Is water deadly??

Turn and talk

Can you die from drinking too much water?

The Cell Membrane & Cell Transport

Cell Membrane: Semi-permeable barrier that regulates the movement of substances in and out of the cell.

Semi-Permeable: Only allows certain substances to pass through.

Cell Transport: Movement of substances in and out of the cell

Multiple Choice

What macromolecule makes up the main component of the cell membrane?

• Lipids

• Proteins

• Nucleic Acid

• Carbohydrates

What's the difference?

Multiple Choice

What macromolecule is this channel made of?

• Lipid

• Protein

• Carbohydrate

• Nucleic acid

• Requires energy (ATP energy)

• Molecules move from LOW to HIGH concentrations

  • Concentration means "amount of"

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Active TransPort

• Does NOT require energy

• Molecules move from HIGH to LOW concentrations

  • Concentration means "amount of"

Passive Transport

Multiple Choice

Under active transport, which direction will the molecules move?

• Bottom to top

• Top to bottom

Multiple Choice

What type of cell transport is occurring in Part C of the diagram shown?

• Active Transport
• Osmosis
• Facilitated Diffusion
• Diffusion

• Diffusion = Movement of molecules from high to low concentrations.

  • Ex. Salt or sugar

• Osmosis = Movement of WATER across the membrane from high to low. ONLY WATER!!

Diffusion and Osmosis

Multiple Choice

Would this image represent osmosis or diffusion?

• Osmosis

• Diffusion

• Active transport

Multiple Choice

Would this image represent osmosis or diffusion?

• Osmosis

• Diffusion

• Active transport

Multiple Choice

In a nerve cell, ATP energy is used to pump sodium (Na) out of the cell and potassium (K) into the cell. This is an example of...

• Facilitated Diffusion
• Simple Diffusion
• Active Transport
• Osmosis

• How water moves in different solutions

• Water moves towards higher solute concentrations!

• All of these are PASSIVE transport!

Osmosis

• No net movement of water

• Concentration of solutes inside and outside the cell are the same

• Cell stays the same

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Isotonic

• Water moves out of the cell

• Higher concentration of solutes outside the cell than inside the cell

• Cell shrinks

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Hypertonic

Multiple Choice

What can we say about the shape of the plant cell when water leaves?

• It shrivels and may cause a plant to wilt.

• It swells and helps the plant stand upright.

• It stays the same and nothing happens.

• Water moves into the cell

• Higher concentration of solutes inside the cell than outside the cell.

• Cell swells/expands and can rupture.

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Hypotonic

Multiple Choice

What is the % of glucose inside and outside the cell?

• Inside cell: 90%

  Outside cell: 10%

• Inside cell: 10%

  Outside cell: 90%

• Inside cell: 50%

  Outside cell: 50%

Multiple Choice

What kind of solution is this cell in?

• Hypertonic

• Hypotonic

• Isotonic

Multiple Choice

Assuming the glucose molecules are too large to pass through a semi-permeable membrane on its own, in which direction will osmosis occur?

• Water moves outside the cell

• Water moves inside the cell

• Water has equal net movement

Multiple Choice

What will happen to the cell in this solution?

• It will swell/expand and possibly lyse (burst).

• It will shrivel.

• It will stay the same

Essential Question

What causes a person to die from drinking too much water? Explain what is happening to the cells.