Cell Membranes

Which way would the purple molecules move through the semi permeable membrane if dissolved in water?

• From the A side to the B-side

• From the B side to the A side

• none of the purple molecules would move

Tags

NGSS.MS-PS1-1

Passive Transport Active Transport

• Passive Transport

• Active Transport

What is it called when molecules move across the cell membrane from an area of high concentration to an area of low concentration through a carrier protein?

• Diffusion

• Osmosis

• Active Transport

• Facilitated Diffusion

Which type of molecules can move through a cell membrane through simple/passive diffusion?

• Very small or non-polar molecules

• Large and polar molecules

• None

• Only CO₂ and O₂

A phospholipid has 2 parts. What are they called?

• Hydrophilic Head, Hydrophobic Tail

• Hydrophobic Head, Hydrophilic Tail

A ______________ is composed of a phosphate and glycerol head and 2 fatty acid chain tails.

• phospholipid

• Carbohydrate

• Cholesterol

• Protein

It forms a boundary between the inside of the cell and the outside of the cell.

• Cell Membrane

• Lipid Cleric Layer

• Membrane Gate

• Protein Receptors

Tags

NGSS.MS-LS1-1

NGSS.MS-LS1-2

Diffusion is the movement of

• water from low to high concentration

• particles from low to high concentration

• water from high to low concentration

• particles from high to low concentration

Large molecules and ions (polar molecules) can easily pass through the cell membrane without any help.

• true- they pass right through

• false- they need a protein channel

A white blood cell engulfing a bacteria is an example of:

• endocytosis

• exocytosis

• cotransport

• facilitated diffusion