Passive Transport

Passive transport requires no

• concentration gradients
• osmosis
• motion
• energy

What is diffusion?

• when molecules move 
• when molecules move from a high concentration to a low.
• no movement 
• molecules move everywhere

What biomolecule is number one pointing to?

• Lipid

• Protein

• Nucleic Acid

• Carbohydrate

Identify the image as showing simple or facilitated diffusion and explain why.

• Simple because the molecule can pass directly through the membrane.

• Facilitated because the molecule requires a protein channel to pass through the membrane.

• Simple because the molecule requires a protein channel to pass through the membrane.

• Facilitated because the molecule can pass directly through the membrane.

Identify the image as showing simple or facilitated diffusion and explain why.

• Simple because the molecule can pass directly through the membrane.

• Facilitated because the molecule requires a protein channel to pass through the membrane.

• Simple because the molecule requires a protein channel to pass through the membrane.

• Facilitated because the molecule can pass directly through the membrane.

Particle of movement from an area of lower concentration to an area of higher concentration.

• Active transport

• Passive transport

Which type of passive transport uses transport proteins to transport items such as glucose through the membrane?

• Facilitated diffusion

• Osmosis

• Diffusion

Cellular transport is regulated by cell membranes. This happens because cell membranes are __________________________.

• impermeable

• fully permeable

• rigid

• selectively permeable

Tags

NGSS.HS-LS2-3

In diffusion, materials always move from areas of _____________ concentration, to areas of _____________ concentration.

• low, high

• high, low

• low, low

• high, high

Cell membranes are described as selectively permeable.

Four students were asked to explain what this means. Which one is correct?

• Student 1: Cell membranes prevent all materials from entering the cell.

• Student 2: Cell membranes only provide structural support for the cell.

• Student 3: Cell membranes regulate which substances can enter and exit the cell.

• Student 4: Cell membranes allow water and water-soluble substances to enter the cell.